Issues with adding/deleting modules and ticker in C

[optimum]

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.

#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
#include<ctype.h>
#include<string.h>
#include <time.h>
void ins(void);
void oldf(void);
void newf(void);
void add(void);
void search(void);
void upd(void);
void del(void);
struct    payroll
    { char no[5];
      char name[25];
      double salary;
      double rate;
      double net;
      } payroll_rec;
 
void main()
{
char i;
time_t now;
time(&now);
 
 
do
  {
    system("cls");
 
    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");
    printf("\n\n Welcome to Optimum Technologies' Payroll Department\t\t\t\t\t  %.24s.\n",ctime(&now));
    printf("\t\t   Main Menu\n\n");
    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");
    printf("\nWhat do you wish to do?\n");
    printf("-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n\n");
    printf("1. Insert Employee Record And Compute Weekly Pay\n");
    printf("2. Display All Records\n");
    printf("3. Compute Monthly Pay Slip\n");
    printf("4. Add Employee Record\n");
    printf("5. Search and View Record\n");
    printf("6. Update Record\n");
    printf("7. Delete Record\n");
    printf("8. Exit\n");
    printf("\n-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
    printf("You choose number :");
    i=getche();
 
      switch(tolower(i))
        {
         case '1': ins();  break;
         case '2': oldf();  break;
         case '3': newf();  break;
         case '4': add();  break;
         case '5': search();  break;
         case '6': upd();  break;
         case '7': del();  break;
         case '8': printf("\7\n\tPlease any key to exit...");
                  getch();
                  exit(0);
         break;
         default : printf("\n\tChoice error !  Please try again.");
         getch();
        }
  }while(i!='7');
 
}
 
void ins(void)
{
FILE *fp;
if((fp=fopen("payroll.txt","wb"))==NULL)
   {
    printf("Error in opening file");
     exit(1);
   }
struct payroll
{
  char no[5];
  char name[25];
  double salary;
  double rate;
  double net;
  } payroll_rec;
char numstr[50];
 system("cls");
 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");
 printf("\n Insert Employee Record And Compute Weekly Pay Module\n");
 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");
do
   {
 
     printf("\n\nEnter Employee No           : ");
     gets(payroll_rec.no);
     printf("Enter Employee Name         : ");
     gets(payroll_rec.name);
    printf("Enter Hours Worked Per Week : ");
     payroll_rec.salary=atof(gets(numstr));
     printf("Enter Hourly Wage           : ");
     payroll_rec.rate=atof(gets(numstr));
     payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
     printf("Your Weekly Pay is RM %.2f\n", payroll_rec.net);
     fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
     printf("Add another person(y/n)? :");
   }
   while(tolower(getche())=='y');
fclose(fp);
printf("\nPress any key to return to main menu");
getch();
}
 
 
void add(void)
{
FILE *fp;
if((fp=fopen("payroll.txt","ab"))==NULL)
    {
     printf("Error in open file");
     printf("\007");
     getch();  exit(1);
    }
char str[10];
 system("cls");
 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");
 printf("\n\t\t Add Record Module\n ");
 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");
  do{
      printf("\nEnter Employee No :");
      gets(payroll_rec.no);
      printf("Enter Employee Name :");
      gets(payroll_rec.name);
      printf("Enter Hours Worked Per Week :");
      payroll_rec.salary=atof(gets(str));
      printf("Enter Hourly Wage:");
      payroll_rec.rate=atof(gets(str));
      payroll_rec.net=payroll_rec.salary*payroll_rec.rate;
      printf("Your Weekly Pay is RM %.2f\n", payroll_rec.net);
      fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
      printf("Add another person(y/n)? :");
     } while(tolower(getche())=='y');
fclose(fp);
 
}     
 
 
void del(void)
{
FILE*fp;
int i=0;
char ans;
char rec[7];
system("cls");
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");
printf("\n\t\t Delete Record Module\n ");
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");
if((fp=fopen("payroll.txt","rb+"))==NULL)
{
printf("Error in open file");
printf("\007");
getch();
exit(1);
}
printf("\n\nThis is data for delete\n");
do{
while(1){
fread(&payroll_rec,sizeof(payroll_rec),1,fp);
if(ferror(fp)){
     printf("\nError read of delete file");
     getch();  exit(1); }
     if(feof(fp))
     break;
     ++i;
     printf("%d. %s\t\t",i,payroll_rec.no);
     }
     printf("\nDo you want to delete data(y or n) :");
     ans=getche();
     if(ans=='y') {
     printf("\nEnter record number :");
     gets(rec);
     fseek(fp,((atoi(rec)-1)*sizeof(payroll_rec)),SEEK_SET);
     strcpy(payroll_rec.no,"\0");
     strcpy(payroll_rec.name,"\0");
     payroll_rec.salary=NULL;
     payroll_rec.rate=NULL;
     payroll_rec.net=NULL;
     fwrite(&payroll_rec,sizeof(payroll_rec),1,fp);
     if(ferror(fp)) {
        printf("Error for delete data\n");
        getch();
        exit(1);
        }
        printf("Delete data complete\n");
        }
        printf("\nContinue(press c) or Exit(press e) :");
        ans=getche();
        printf("\n");
        }while(ans!='e');
        fclose(fp);
        }

[sicarie]

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.

Okay, could you rephrase your issue with the add record bit? I'm not following you. Also, you posted a new question, so please use a new thread. Thanks

(You don't have to use a new thread now, as I am going to split this off for you, but in the future when you have a new question and new code please use a new thread. If the question is a continuation of the same code, please stay in the same thread. This is a different enough topic that I am going to pull it out, as I don't believe you're working on code conversion anymore as opposed to just getting the code you have working.)

[optimum]

Sorry for the trouble, still new in the forum.

Actually my question is my coding have problem in its search file module, where when i search for an unavailable file, it keep showing me other file where in my coding i have used "if" function to show error if the search does not found any record. can anybody help me troubleshoot where is the problem. The coding is at the top of the page. Please look for void search();.
And i also would like to know how can i make the time working.

thank you