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Need help in converting C++ to C

10 New Member
hi i am kind of new to programming, i have managed to create a simple payroll database in C++, but now i am trying to convert in into C but i am keep getting error, can anyone help me convert this code to C. I really need this so thatr i can learn my mistakes in C. Below is the C++ code that i have have developed.
Thank you,
Expand|Select|Wrap|Line Numbers
  1. #include<fstream>
  2. #include<string>
  3. #include<iostream>
  4. #include<iomanip>
  5. using namespace std;
  6. struct employee{ string fname, lname;
  7. double hourlyrate, hoursworked, netpay; }; //employee
  8. employee e[100];
  9. int n=0;
  10. void load(){
  11. ifstream fin("employee.txt",ios::in);
  12. while(fin>>e[n].fname>>e[n].lname>>e[n].hourlyrate>>e[n].hoursworked){
  13. e[n].netpay=e[n].hourlyrate*e[n].hoursworked;
  14. n++;}//WHILE
  15. }//LOAD
  16. void store(){
  17. ofstream fout("employee.txt",ios::out);
  18. for(int i=0; i<n; i++){
  19. if(e[i].fname!=" ")
  20. fout<<e[i].fname<<" "<<e[i].lname<<" "<<e[i].hourlyrate<<" "<<e[i].hoursworked<<endl;
  21. }//FOR
  22. }//STORE
  23.  
  24. void insert(){
  25. cout<<"Enter employee's first name: "; cin>>e[n].fname;
  26. cout<<"Enter employee's last name: "; cin>>e[n].lname;
  27. cout<<"Enter employee's salary per hour: "; cin>>e[n].hourlyrate;
  28. if(cin.fail())
  29. {cout<<"Error\n"; exit(1);}
  30. cout<<"Enter employee's hours worked: ";
  31. cin>>e[n].hoursworked;
  32. e[n].netpay=e[n].hourlyrate*e[n].hoursworked;
  33. n++; }//INSERTS THE RECORD TO ARRAY
  34.  
  35. void display(){
  36. cout<<setiosflags(ios::left)<<setw(15)<<"First Name"<<setw(15)<<"Last Name";
  37. cout<<setw(10)<<"Hourly Rate"<<setw(10)<<"HrsWorked"<<setw(10)<<"Net Pay";
  38. cout<<endl<<endl;
  39. cout<<setiosflags(ios::fixed|ios::showpoint|ios::left);
  40. for(int i=0;i<n;i++){
  41. if(e[i].fname!=" "){ 
  42. cout<<setiosflags(ios::left)<<setw(15)<<e[i].fname<<setw(15)<<e[i].lname;
  43. cout<<setprecision(2)<<setiosflags(ios::left)<<setw(10)<<e[i].hourlyrate;
  44. cout<<setw(10)<<e[i].hoursworked<<setw(10)<<e[i].netpay;
  45. cout<<resetiosflags(ios::left)<<endl;}//IF
  46. }//FOR
  47. }//THIS FUNCTION DISPLAYS ALL RECORDS IN ARRAY
  48.  
  49. int search(string s){
  50. for(int i=0;i<n;i++)if(s==e[i].lname)return i;//FOR
  51. return -1;
  52. }//SEARCH BY NAME,-1 NOT FOUND
  53.  
  54. void update(){
  55. string searchn;
  56. cout<<"Enter the Last Name of the Employee to be modified: "; cin>>searchn;
  57. int i=search(searchn); 
  58. if(i==-1) cout<<"EMPLOYEE NOT LISTED"<<endl;
  59. else{
  60. cout<<endl<<"Please enter the updated information."<<endl;
  61. cout<<"Enter employee's first name: "; cin>>e[i].fname;
  62. cout<<"Enter employee's last name: "; cin>>e[i].lname;
  63. cout<<"Enter employee's rate per hour: "; cin>>e[i].hourlyrate;
  64. cout<<"Enter employee's hours worked: "; cin>>e[i].hoursworked;
  65. e[i].netpay=(e[i].hourlyrate*e[i].hoursworked);}
  66. }//UPDATE
  67.  
  68. void deleterec(){
  69. string searchn;
  70. cout<<"Enter the Last Name of the Employee to delete: "; cin>>searchn;
  71. int k=-1;
  72. for(int j=0; j<n;j++){
  73. if(searchn==e[j].lname)
  74. k=j;}
  75. if(k!=-1)
  76. { cout<<" Name: "<<e[k].fname<<" "<<e[k].lname<<endl;
  77. cout<<" Salary: "<<e[k].hourlyrate<<endl;
  78. cout<<" Hrs Worked: "<<e[k].hoursworked<<endl;
  79. cout<<" Net Pay: "<<e[k].netpay<<endl<<endl;}
  80.  
  81. char ans;
  82. cout<<endl<<"Do you want to delete this record? (Y/N): ";
  83. cin>>ans;
  84. if(ans=='Y'||ans=='y'){
  85. e[k].fname=" ";}//IF
  86. else cout<<"EMPLOYEE NOT FOUND"; }//DELETE
  87.  
  88. void report(){
  89. int i=0;
  90. double totalhrs=0.00, totalpay=0.00;
  91. for(i=0;i<n;i++){
  92. totalhrs+=e[i].hoursworked;
  93. totalpay+=e[i].netpay; }//FOR
  94. cout<<"Total number of employees: " <<n<<endl<<endl;
  95. cout<<"Total hours worked by all employees: "<<totalhrs<<endl<<endl;
  96. cout<<"Total pay of all employees: "<<totalpay<<endl<<endl; }//REPORT
  97.  
  98. void deletefile(){
  99. int pword;
  100. cout<<"Enter your administrative password: "; cin>>pword;
  101. if(pword==0000){
  102. ofstream record("employee.txt", ios::out);
  103. record<<endl;
  104. load();
  105. record.close();}
  106. else cout<<"Wrong password entered."<<endl; }//DELETE FILE
  107.  
  108. void backupfile(){
  109. system("copy employee.txt backup.txt");
  110. cout<<endl<<"Back-up file has been made."<<endl;
  111. }//BACKUPFILE use cp command for UNIX
  112.  
  113. void main(){
  114. load();
  115. char choice='0';
  116. while (choice!='e'&&choice!='E'){
  117. cout<<endl<<"Payroll Database"<<endl;
  118. cout<<"1. Insert Employee Record and Compute Net Pay"<<endl;
  119. cout<<"2. Display All Records"<<endl;
  120. cout<<"3. Search Database"<<endl;
  121. cout<<"4. Update Record"<<endl;
  122. cout<<"5. Delete Record"<<endl;
  123. cout<<"6. Generate Report"<<endl;
  124. cout<<"7. Delete Database File"<<endl;
  125. cout<<"8. Back-up Database File"<<endl;
  126. cout<<endl<<" Type e to exit"<<endl<<endl;
  127. cout<<"Enter the number of your choice:";
  128. cin>>choice; cout<<endl;
  129. switch (choice){
  130. case '1': insert(); break;
  131. case '2': display(); break;
  132. case '3': char s[100]; int index;
  133. cout<<"Enter the last name of the person you want: ";
  134. cin>>s;
  135. index=search(s);
  136. if(index!=-1) {
  137. cout<<"Name: "<<e[index].fname<<" "<<e[index].lname<<endl;
  138. cout<<"Hourly Rate: "<<e[index].hourlyrate<<endl;
  139. cout<<"Hrs Worked: "<<e[index].hoursworked<<endl;
  140. cout<<"Net Pay: "<<e[index].netpay<<endl<<endl;}//IF
  141. else cout<<"EMPLOYEE NOT FOUND"<<endl;
  142. break;
  143. case '4': update(); break;
  144. case '5': deleterec(); break;
  145. case '6': report(); break;
  146. case '7': deletefile(); break;
  147. case '8': backupfile(); break;
  148. case 'e': store(); break; //EXIT
  149. default: cout<<"Invalid Choice"<<endl; break; }//SWITCH
  150. }//WHILE
  151. }//MAIN
Sep 25 '07
14 2450
RRick
463 Recognized Expert Contributor
The above fprintf format statement assumes that the last two values are integers. If they are doubles, use "%lf" instead of "%d".
Oct 1 '07 #11
optimum
10 New Member
Hi I am sorry for not updating my progress for the past 2 weeks, i have tried all those ideas given but i am having errors (almost 300), please someone help me translate the whole coding for me, i am feel very bad for requesting this, but i cant do it its really hard for me as i am still new, please someone help me i will need this to as a reference for my studies.
Oct 16 '07 #12
sicarie
4,677 Recognized Expert Moderator Specialist
Sorry dude, nobody here can (see our Posting Guidelines) or will (because it's your assignment) do your work for you. If you post the errors you are having trouble with, we can point you in the right direction. Or if you post a generic error, we can show you how to break it down (usually there is a line number around which the issue is - or something on that line caused the issue because it was instantiated/modified improperly, etc..), but we won't do it for you.

Also, cutting and pasting errors into Google usually will return someone who has had the same issue as you...
Oct 17 '07 #13
optimum
10 New Member
I have develop a new coding using C, with some problem where the search and update functions are working but when I enter a record which is not available it getting me to another record, my delete module also is notworking properly, and how to make my time tick. Below is my coding, thankyou for any help.

Expand|Select|Wrap|Line Numbers
  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. #include<conio.h>
  4. #include<ctype.h>
  5. #include<string.h>
  6. #include <time.h>
  7. void ins(void);
  8. void oldf(void);
  9. void newf(void);
  10. void add(void);
  11. void search(void);
  12. void upd(void);
  13. void del(void);
  14. struct    payroll
  15.     { char no[5];
  16.       char name[25];
  17.       double salary;
  18.       double rate;
  19.       double net;
  20.       } payroll_rec;
  21.  
  22. void main()
  23. {
  24. char i;
  25. time_t now;
  26. time(&now);
  27.  
  28.  
  29. do
  30.   {
  31.     system("cls");
  32.  
  33.     printf("\n\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\7");
  34.     printf("\n\n Welcome to Optimum Technologies' Payroll Department\t\t\t\t\t  %.24s.\n",ctime(&now));
  35.     printf("\t\t   Main Menu\n\n");
  36.     printf("\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\n");
  37.     printf("\nWhat do you wish to do?\n");
  38.     printf("-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n\n");
  39.     printf("1. Insert Employee Record And Compute Weekly Pay\n");
  40.     printf("2. Display All Records\n");
  41.     printf("3. Compute Monthly Pay Slip\n");
  42.     printf("4. Add Employee Record\n");
  43.     printf("5. Search and View Record\n");
  44.     printf("6. Update Record\n");
  45.     printf("7. Delete Record\n");
  46.     printf("8. Exit\n");
  47.     printf("\n-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
  48.     printf("You choose number :");
  49.     i=getche();
  50.  
  51.       switch(tolower(i))
  52.         {
  53.          case '1': ins();  break;
  54.          case '2': oldf();  break;
  55.          case '3': newf();  break;
  56.          case '4': add();  break;
  57.          case '5': search();  break;
  58.          case '6': upd();  break;
  59.          case '7': del();  break;
  60.          case '8': printf("\7\n\tPlease any key to exit...");
  61.                   getch();
  62.                   exit(0);
  63.          break;
  64.          default : printf("\n\tChoice error !  Please try again.");
  65.          getch();
  66.         }
  67.   }while(i!='7');
  68.  
  69. }
  70.  
  71. void ins(void)
  72. {
  73. FILE *fp;
  74. if((fp=fopen("payroll.txt","wb"))==NULL)
  75.    {
  76.     printf("Error in opening file");
  77.      exit(1);
  78.    }
  79. struct payroll
  80. {
  81.   char no[5];
  82.   char name[25];
  83.   double salary;
  84.   double rate;
  85.   double net;
  86.   } payroll_rec;
  87. char numstr[50];
  88.  system("cls");
  89.  printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  90.  printf("\n Insert Employee Record And Compute Weekly Pay Module\n");
  91.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3");
  92. do
  93.    {
  94.  
  95.      printf("\n\nEnter Employee No           : ");
  96.      gets(payroll_rec.no);
  97.      printf("Enter Employee Name         : ");
  98.      gets(payroll_rec.name);
  99.     printf("Enter Hours Worked Per Week : ");
  100.      payroll_rec.salary=atof(gets(numstr));
  101.      printf("Enter Hourly Wage           : ");
  102.      payroll_rec.rate=atof(gets(numstr));
  103.      payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
  104.      printf("Your Weekly Pay is RM %.2f\n", payroll_rec.net);
  105.      fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  106.      printf("Add another person(y/n)? :");
  107.    }
  108.    while(tolower(getche())=='y');
  109. fclose(fp);
  110. printf("\nPress any key to return to main menu");
  111. getch();
  112. }
  113.  
  114. void oldf(void)
  115. {
  116. FILE *fp;
  117. if((fp=fopen("payroll.txt","rb"))==NULL)
  118.     {
  119.      printf("Error in open file");
  120.      printf("\007");
  121.      getch();  exit(1);
  122.          } system("cls");
  123.  printf("\n \5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\7");
  124.  printf("\n\t\t\t Display Record Module\n ");
  125.  printf("\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\n\n");
  126.    printf("\n\n**********************************************************************\n");
  127.    printf(" Employee ID  Employee Name     Hours Worked   Hourly Wage   Weekly Pay\n");
  128.    printf("***********************************************************************\n");
  129.   while(fread(&payroll_rec,sizeof(payroll_rec),1,fp)==1)
  130.   {
  131.       printf(" %s\t\t%s\t\t%.2f\t%.2f\t\t%.2f\t\t\n",payroll_rec.no,payroll_rec.name,payroll_rec.salary,payroll_rec.rate,payroll_rec.net);
  132.  
  133.     }
  134. fclose(fp);
  135.  printf("Press any key to return to main menu\n");
  136. getch();
  137. }
  138.  
  139. void newf(void)
  140. {
  141. double net;
  142. double total;
  143. FILE *fp;
  144. if((fp=fopen("payroll.txt","rb"))==NULL)
  145.     {
  146.      printf("Error in open file");
  147.      printf("\007");
  148.      getch();  exit(1);
  149.     } system("cls");
  150.  printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  151.  printf("\n\t\t   Compute Monthly Pay Slip Module\n");
  152.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\n\n");
  153. while(fread(&payroll_rec,sizeof(payroll_rec),1,fp)==1)
  154.     {
  155.  
  156.     net=payroll_rec.salary*payroll_rec.rate*4;
  157.     total=payroll_rec.salary*4;
  158.     printf("\n\n||======================================================================||\n");
  159.     printf("||\t\t\tOptimum Technologies Pay Vaucher                ||\n");
  160.     printf("||                                                                      ||\n");
  161.     printf("||Employee Name : %s\t\t\t\t\t\t||\n",payroll_rec.name);
  162.     printf("||Empolyee ID   : %s\t\t\t\t\t\t\t||\n",payroll_rec.no);
  163.     printf("||Hours Worked  : %.2f\t\t\t\t\t\t\t||\n",total);
  164.     printf("||Hourly Wage   : RM %.2f\t\t\t\t\t\t\t||",payroll_rec.rate);
  165.     printf("||Net Salary    : RM %.2f\t\t\t\t\t\t||\n",net);
  166.     printf("||                                                                      ||\n");
  167.     printf("||This is a digitally signed voucher it does not require signature\t||\n");
  168.     printf("||                                                                      ||\n");
  169.     printf("||======================================================================||\n");
  170.   }
  171.   fclose(fp);
  172.   printf("Press any key to return to main menu");
  173.   getch();
  174. }
  175.  
  176. void add(void)
  177. {
  178. FILE *fp;
  179. if((fp=fopen("payroll.txt","ab"))==NULL)
  180.     {
  181.      printf("Error in open file");
  182.      printf("\007");
  183.      getch();  exit(1);
  184.     }
  185. char str[10];
  186.  system("cls");
  187.  printf("\n \5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\7");
  188.  printf("\n\t\t Add Record Module\n ");
  189.  printf("\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\n\n");
  190.   do{
  191.       printf("\nEnter Employee No :");
  192.       gets(payroll_rec.no);
  193.       printf("Enter Employee Name :");
  194.       gets(payroll_rec.name);
  195.       printf("Enter Hours Worked Per Week :");
  196.       payroll_rec.salary=atof(gets(str));
  197.       printf("Enter Hourly Wage:");
  198.       payroll_rec.rate=atof(gets(str));
  199.       payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
  200.       printf("Your Weekly Pay is RM %.2f\n", payroll_rec.net);
  201.       fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  202.       printf("Add another person(y/n)? :");
  203.      } while(tolower(getche())=='y');
  204. fclose(fp);
  205.  
  206. }
  207.  
  208.  
  209. void search(void)
  210. {
  211. FILE *fp;
  212. int i=0;
  213. int rec;
  214. char ch;
  215. int offset;
  216. system("cls");
  217. printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  218.  printf("\n\t\t   Serach and View Record Module\n");
  219.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\n\n");
  220.  
  221.   if((fp=fopen("payroll.txt","rb"))==NULL)
  222.     {
  223.      printf("\nError in open file");
  224.      printf("\007");
  225.      getch(); 
  226.      exit(1);
  227.     }
  228.  do
  229. {
  230.     printf("\n\nEnter record number to search :");
  231.     scanf("%d",&rec);  ch=getchar();
  232.     offset=(rec-1)*sizeof(payroll_rec);
  233.      if(fseek(fp,offset,0)!=0)
  234.      {
  235.       printf("Can't not find.\n");
  236.       getch(); 
  237.      exit(1);
  238.  
  239.      }
  240.      fread(&payroll_rec,sizeof(payroll_rec),1,fp);
  241.       printf("\nEmployee ID   : %s\n",payroll_rec.no);
  242.       printf("Employee Name : %s\n",payroll_rec.name);
  243.       printf("Hours Worked  : %.2f\n",payroll_rec.salary);
  244.       printf("Hourly Wage   : %.2f\n",payroll_rec.rate);
  245.       printf("Weekly Salary : %.2f\n",payroll_rec.net);
  246.       printf("Do you wish to continue(y/n)? :");
  247.  
  248.  
  249. }
  250.    while(tolower(getche())=='y');
  251. fclose(fp);
  252. printf("\nPress any key to return to main menu");
  253. getch();
  254. }    
  255.  
  256.  
  257. void upd(void)
  258. {
  259. FILE *fp;
  260. int i=0;
  261. int rec;
  262. char ch,str[20];
  263. char id[5];
  264. int offset;
  265. system("cls");
  266. printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  267.  printf("\n\t\t   Update Record Module\n");
  268.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\n\n");
  269.  
  270.   if((fp=fopen("payroll.txt","rb"))==NULL)
  271.     {
  272.      printf("\nError in open file");
  273.      printf("\007");
  274.      getch();  exit(1);
  275.     }
  276.  
  277.     printf("\nEnter record number :");
  278.     scanf("%d",&rec);  ch=getchar();
  279.     offset=(rec-1)*sizeof(payroll_rec);
  280.      if(fseek(fp,offset,0)!=0)
  281.      {
  282.       printf("Can't not find.\n");
  283.       getch();
  284.       exit(1);
  285.      }
  286.      fread(&payroll_rec,sizeof(payroll_rec),1,fp);
  287.     strcpy(id,payroll_rec.no);
  288.      getch();
  289.   fp=fopen("payroll.txt","r+b");
  290.   offset=(rec-1)*sizeof(payroll_rec);
  291.     if(fseek(fp,offset,0)!=0)
  292.     {
  293.      printf("Can't not find.\n");
  294.      getch();
  295.      exit(1);
  296.     }
  297.       printf("\nEnter Employee ID :%s\n",id);
  298.       strcpy(payroll_rec.no,id);
  299.      printf("Enter Employee Name :");
  300.      gets(payroll_rec.name);
  301.       printf("Enter Hours Worked :");
  302.       payroll_rec.salary=atof(gets(str));
  303.       printf("Enter Hourly Wage:");
  304.       payroll_rec.rate=atof(gets(str));
  305.       payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
  306.       fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  307.  
  308. fclose(fp);
  309. printf("Press any key to return to main menu");
  310. }
  311.  
  312. void del(void)
  313. {
  314. FILE*fp;
  315. int i=0;
  316. char ans;
  317. char rec[7];
  318. system("cls");
  319. printf("\n \5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\7");
  320. printf("\n\t\t Delete Record Module\n ");
  321. printf("\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\n\n");
  322. if((fp=fopen("payroll.txt","rb+"))==NULL)
  323. {
  324. printf("Error in open file");
  325. printf("\007");
  326. getch();
  327. exit(1);
  328. }
  329. printf("\n\nThis is data for delete\n");
  330. do{
  331. while(1){
  332. fread(&payroll_rec,sizeof(payroll_rec),1,fp);
  333. if(ferror(fp)){
  334.      printf("\nError read of delete file");
  335.      getch();  exit(1); }
  336.      if(feof(fp))
  337.      break;
  338.      ++i;
  339.      printf("%d. %s\t\t",i,payroll_rec.no);
  340.      }
  341.      printf("\nDo you want to delete data(y or n) :");
  342.      ans=getche();
  343.      if(ans=='y') {
  344.      printf("\nEnter record number :");
  345.      gets(rec);
  346.      fseek(fp,((atoi(rec)-1)*sizeof(payroll_rec)),SEEK_SET);
  347.      strcpy(payroll_rec.no,"\0");
  348.      strcpy(payroll_rec.name,"\0");
  349.      payroll_rec.salary=NULL;
  350.      payroll_rec.rate=NULL;
  351.      payroll_rec.net=NULL;
  352.      fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  353.      if(ferror(fp)) {
  354.         printf("Error for delete data\n");
  355.         getch();
  356.         exit(1);
  357.         }
  358.         printf("Delete data complete\n");
  359.         }
  360.         printf("\nContinue(press c) or Exit(press e) :");
  361.         ans=getche();
  362.         printf("\n");
  363.         }while(ans!='e');
  364.         fclose(fp);
Oct 19 '07 #14
optimum
10 New Member
I have develop a new coding using C, with some problem where the search and update functions are working but when I enter a record which is not available it getting me to another record, my delete module also is notworking properly, and how to make my time tick. Below is my coding, thankyou for any help.

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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3. #include<conio.h>
  4. #include<ctype.h>
  5. #include<string.h>
  6. #include <time.h>
  7. void ins(void);
  8. void oldf(void);
  9. void newf(void);
  10. void add(void);
  11. void search(void);
  12. void upd(void);
  13. void del(void);
  14. struct    payroll
  15.     { char no[5];
  16.       char name[25];
  17.       double salary;
  18.       double rate;
  19.       double net;
  20.       } payroll_rec;
  21.  
  22. void main()
  23. {
  24. char i;
  25. time_t now;
  26. time(&now);
  27.  
  28.  
  29. do
  30.   {
  31.     system("cls");
  32.  
  33.     printf("\n\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\7");
  34.     printf("\n\n Welcome to Optimum Technologies' Payroll Department\t\t\t\t\t  %.24s.\n",ctime(&now));
  35.     printf("\t\t   Main Menu\n\n");
  36.     printf("\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\4\n");
  37.     printf("\nWhat do you wish to do?\n");
  38.     printf("-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n\n");
  39.     printf("1. Insert Employee Record And Compute Weekly Pay\n");
  40.     printf("2. Display All Records\n");
  41.     printf("3. Compute Monthly Pay Slip\n");
  42.     printf("4. Add Employee Record\n");
  43.     printf("5. Search and View Record\n");
  44.     printf("6. Update Record\n");
  45.     printf("7. Delete Record\n");
  46.     printf("8. Exit\n");
  47.     printf("\n-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
  48.     printf("You choose number :");
  49.     i=getche();
  50.  
  51.       switch(tolower(i))
  52.         {
  53.          case '1': ins();  break;
  54.          case '2': oldf();  break;
  55.          case '3': newf();  break;
  56.          case '4': add();  break;
  57.          case '5': search();  break;
  58.          case '6': upd();  break;
  59.          case '7': del();  break;
  60.          case '8': printf("\7\n\tPlease any key to exit...");
  61.                   getch();
  62.                   exit(0);
  63.          break;
  64.          default : printf("\n\tChoice error !  Please try again.");
  65.          getch();
  66.         }
  67.   }while(i!='7');
  68.  
  69. }
  70.  
  71. void ins(void)
  72. {
  73. FILE *fp;
  74. if((fp=fopen("payroll.txt","wb"))==NULL)
  75.    {
  76.     printf("Error in opening file");
  77.      exit(1);
  78.    }
  79. struct payroll
  80. {
  81.   char no[5];
  82.   char name[25];
  83.   double salary;
  84.   double rate;
  85.   double net;
  86.   } payroll_rec;
  87. char numstr[50];
  88.  system("cls");
  89.  printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  90.  printf("\n Insert Employee Record And Compute Weekly Pay Module\n");
  91.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3");
  92. do
  93.    {
  94.  
  95.      printf("\n\nEnter Employee No           : ");
  96.      gets(payroll_rec.no);
  97.      printf("Enter Employee Name         : ");
  98.      gets(payroll_rec.name);
  99.     printf("Enter Hours Worked Per Week : ");
  100.      payroll_rec.salary=atof(gets(numstr));
  101.      printf("Enter Hourly Wage           : ");
  102.      payroll_rec.rate=atof(gets(numstr));
  103.      payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
  104.      printf("Your Weekly Pay is RM %.2f\n", payroll_rec.net);
  105.      fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  106.      printf("Add another person(y/n)? :");
  107.    }
  108.    while(tolower(getche())=='y');
  109. fclose(fp);
  110. printf("\nPress any key to return to main menu");
  111. getch();
  112. }
  113.  
  114. void oldf(void)
  115. {
  116. FILE *fp;
  117. if((fp=fopen("payroll.txt","rb"))==NULL)
  118.     {
  119.      printf("Error in open file");
  120.      printf("\007");
  121.      getch();  exit(1);
  122.          } system("cls");
  123.  printf("\n \5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\7");
  124.  printf("\n\t\t\t Display Record Module\n ");
  125.  printf("\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\n\n");
  126.    printf("\n\n**********************************************************************\n");
  127.    printf(" Employee ID  Employee Name     Hours Worked   Hourly Wage   Weekly Pay\n");
  128.    printf("***********************************************************************\n");
  129.   while(fread(&payroll_rec,sizeof(payroll_rec),1,fp)==1)
  130.   {
  131.       printf(" %s\t\t%s\t\t%.2f\t%.2f\t\t%.2f\t\t\n",payroll_rec.no,payroll_rec.name,payroll_rec.salary,payroll_rec.rate,payroll_rec.net);
  132.  
  133.     }
  134. fclose(fp);
  135.  printf("Press any key to return to main menu\n");
  136. getch();
  137. }
  138.  
  139. void newf(void)
  140. {
  141. double net;
  142. double total;
  143. FILE *fp;
  144. if((fp=fopen("payroll.txt","rb"))==NULL)
  145.     {
  146.      printf("Error in open file");
  147.      printf("\007");
  148.      getch();  exit(1);
  149.     } system("cls");
  150.  printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  151.  printf("\n\t\t   Compute Monthly Pay Slip Module\n");
  152.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\n\n");
  153. while(fread(&payroll_rec,sizeof(payroll_rec),1,fp)==1)
  154.     {
  155.  
  156.     net=payroll_rec.salary*payroll_rec.rate*4;
  157.     total=payroll_rec.salary*4;
  158.     printf("\n\n||======================================================================||\n");
  159.     printf("||\t\t\tOptimum Technologies Pay Vaucher                ||\n");
  160.     printf("||                                                                      ||\n");
  161.     printf("||Employee Name : %s\t\t\t\t\t\t||\n",payroll_rec.name);
  162.     printf("||Empolyee ID   : %s\t\t\t\t\t\t\t||\n",payroll_rec.no);
  163.     printf("||Hours Worked  : %.2f\t\t\t\t\t\t\t||\n",total);
  164.     printf("||Hourly Wage   : RM %.2f\t\t\t\t\t\t\t||",payroll_rec.rate);
  165.     printf("||Net Salary    : RM %.2f\t\t\t\t\t\t||\n",net);
  166.     printf("||                                                                      ||\n");
  167.     printf("||This is a digitally signed voucher it does not require signature\t||\n");
  168.     printf("||                                                                      ||\n");
  169.     printf("||======================================================================||\n");
  170.   }
  171.   fclose(fp);
  172.   printf("Press any key to return to main menu");
  173.   getch();
  174. }
  175.  
  176. void add(void)
  177. {
  178. FILE *fp;
  179. if((fp=fopen("payroll.txt","ab"))==NULL)
  180.     {
  181.      printf("Error in open file");
  182.      printf("\007");
  183.      getch();  exit(1);
  184.     }
  185. char str[10];
  186.  system("cls");
  187.  printf("\n \5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\7");
  188.  printf("\n\t\t Add Record Module\n ");
  189.  printf("\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\n\n");
  190.   do{
  191.       printf("\nEnter Employee No :");
  192.       gets(payroll_rec.no);
  193.       printf("Enter Employee Name :");
  194.       gets(payroll_rec.name);
  195.       printf("Enter Hours Worked Per Week :");
  196.       payroll_rec.salary=atof(gets(str));
  197.       printf("Enter Hourly Wage:");
  198.       payroll_rec.rate=atof(gets(str));
  199.       payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
  200.       printf("Your Weekly Pay is RM %.2f\n", payroll_rec.net);
  201.       fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  202.       printf("Add another person(y/n)? :");
  203.      } while(tolower(getche())=='y');
  204. fclose(fp);
  205.  
  206. }
  207.  
  208.  
  209. void search(void)
  210. {
  211. FILE *fp;
  212. int i=0;
  213. int rec;
  214. char ch;
  215. int offset;
  216. system("cls");
  217. printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  218.  printf("\n\t\t   Serach and View Record Module\n");
  219.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\n\n");
  220.  
  221.   if((fp=fopen("payroll.txt","rb"))==NULL)
  222.     {
  223.      printf("\nError in open file");
  224.      printf("\007");
  225.      getch(); 
  226.      exit(1);
  227.     }
  228.  do
  229. {
  230.     printf("\n\nEnter record number to search :");
  231.     scanf("%d",&rec);  ch=getchar();
  232.     offset=(rec-1)*sizeof(payroll_rec);
  233.      if(fseek(fp,offset,0)!=0)
  234.      {
  235.       printf("Can't not find.\n");
  236.       getch(); 
  237.      exit(1);
  238.  
  239.      }
  240.      fread(&payroll_rec,sizeof(payroll_rec),1,fp);
  241.       printf("\nEmployee ID   : %s\n",payroll_rec.no);
  242.       printf("Employee Name : %s\n",payroll_rec.name);
  243.       printf("Hours Worked  : %.2f\n",payroll_rec.salary);
  244.       printf("Hourly Wage   : %.2f\n",payroll_rec.rate);
  245.       printf("Weekly Salary : %.2f\n",payroll_rec.net);
  246.       printf("Do you wish to continue(y/n)? :");
  247.  
  248.  
  249. }
  250.    while(tolower(getche())=='y');
  251. fclose(fp);
  252. printf("\nPress any key to return to main menu");
  253. getch();
  254. }    
  255.  
  256.  
  257. void upd(void)
  258. {
  259. FILE *fp;
  260. int i=0;
  261. int rec;
  262. char ch,str[20];
  263. char id[5];
  264. int offset;
  265. system("cls");
  266. printf("\n\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\7");
  267.  printf("\n\t\t   Update Record Module\n");
  268.  printf("\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\3\n\n");
  269.  
  270.   if((fp=fopen("payroll.txt","rb"))==NULL)
  271.     {
  272.      printf("\nError in open file");
  273.      printf("\007");
  274.      getch();  exit(1);
  275.     }
  276.  
  277.     printf("\nEnter record number :");
  278.     scanf("%d",&rec);  ch=getchar();
  279.     offset=(rec-1)*sizeof(payroll_rec);
  280.      if(fseek(fp,offset,0)!=0)
  281.      {
  282.       printf("Can't not find.\n");
  283.       getch();
  284.       exit(1);
  285.      }
  286.      fread(&payroll_rec,sizeof(payroll_rec),1,fp);
  287.     strcpy(id,payroll_rec.no);
  288.      getch();
  289.   fp=fopen("payroll.txt","r+b");
  290.   offset=(rec-1)*sizeof(payroll_rec);
  291.     if(fseek(fp,offset,0)!=0)
  292.     {
  293.      printf("Can't not find.\n");
  294.      getch();
  295.      exit(1);
  296.     }
  297.       printf("\nEnter Employee ID :%s\n",id);
  298.       strcpy(payroll_rec.no,id);
  299.      printf("Enter Employee Name :");
  300.      gets(payroll_rec.name);
  301.       printf("Enter Hours Worked :");
  302.       payroll_rec.salary=atof(gets(str));
  303.       printf("Enter Hourly Wage:");
  304.       payroll_rec.rate=atof(gets(str));
  305.       payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
  306.       fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  307.  
  308. fclose(fp);
  309. printf("Press any key to return to main menu");
  310. }
  311.  
  312. void del(void)
  313. {
  314. FILE*fp;
  315. int i=0;
  316. char ans;
  317. char rec[7];
  318. system("cls");
  319. printf("\n \5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\7");
  320. printf("\n\t\t Delete Record Module\n ");
  321. printf("\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\5\n\n");
  322. if((fp=fopen("payroll.txt","rb+"))==NULL)
  323. {
  324. printf("Error in open file");
  325. printf("\007");
  326. getch();
  327. exit(1);
  328. }
  329. printf("\n\nThis is data for delete\n");
  330. do{
  331. while(1){
  332. fread(&payroll_rec,sizeof(payroll_rec),1,fp);
  333. if(ferror(fp)){
  334.      printf("\nError read of delete file");
  335.      getch();  exit(1); }
  336.      if(feof(fp))
  337.      break;
  338.      ++i;
  339.      printf("%d. %s\t\t",i,payroll_rec.no);
  340.      }
  341.      printf("\nDo you want to delete data(y or n) :");
  342.      ans=getche();
  343.      if(ans=='y') {
  344.      printf("\nEnter record number :");
  345.      gets(rec);
  346.      fseek(fp,((atoi(rec)-1)*sizeof(payroll_rec)),SEEK_SET);
  347.      strcpy(payroll_rec.no,"\0");
  348.      strcpy(payroll_rec.name,"\0");
  349.      payroll_rec.salary=NULL;
  350.      payroll_rec.rate=NULL;
  351.      payroll_rec.net=NULL;
  352.      fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
  353.      if(ferror(fp)) {
  354.         printf("Error for delete data\n");
  355.         getch();
  356.         exit(1);
  357.         }
  358.         printf("Delete data complete\n");
  359.         }
  360.         printf("\nContinue(press c) or Exit(press e) :");
  361.         ans=getche();
  362.         printf("\n");
  363.         }while(ans!='e');
  364.         fclose(fp);
  365.         }
Oct 19 '07 #15

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