How to search for matching names in the dat file?

[m1m11]

I m doing my work and the question was being asked.User of the program suppose to type in the product name,and the program will search through the dat files created earlier on and find matching result.For example,user type in 1Gb ram,then the price of the ram will be shown.How am i suppose to do this?thanks in advance for any help.I m in C language.

[gpraghuram]

I m doing my work and the question was being asked.User of the program suppose to type in the product name,and the program will search through the dat files created earlier on and find matching result.For example,user type in 1Gb ram,then the price of the ram will be shown.How am i suppose to do this?thanks in advance for any help.I m in C language.

What have you done on this or you have written any code for this.
Please write your code first and come back here with the problems you face and we can help you.
Thanks
Raghuram

[m1m11]

What have you done on this or you have written any code for this.
Please write your code first and come back here with the problems you face and we can help you.
Thanks
Raghuram

#include <stdio.h>
void main () {
    FILE*pr=fopen("price.dat","r");
   double cost;
   char name[20],nm[20];
      while (fscanf(pr,"%s%lf",&name,&cost) !=EOF)
   {printf("Item required:");
    scanf("%s",&nm);
 

this is how far i can get...so how am i suppose to do so that the program search in the dat file and give me the corresponding price?thanks

[gpraghuram]

#include <stdio.h>
void main () {
    FILE*pr=fopen("price.dat","r");
   double cost;
   char name[20],nm[20];
      while (fscanf(pr,"%s%lf",&name,&cost) !=EOF)
   {printf("Item required:");
    scanf("%s",&nm);
 

this is how far i can get...so how am i suppose to do so that the program search in the dat file and give me the corresponding price?thanks

Hi,
Thle logic shuld be like this
1)Get the pattern to search for
2)Open the file
3)Start reading the file
3.1)if you know the pattern then get the name with which you need to compare
3.2)Do this till you reach the end of file or you get the pattern
4)Print the result and exit

Raghuram

[m1m11]

Hi,
Thle logic shuld be like this
1)Get the pattern to search for
2)Open the file
3)Start reading the file
3.1)if you know the pattern then get the name with which you need to compare
3.2)Do this till you reach the end of file or you get the pattern
4)Print the result and exit

Raghuram

thanks.that is what i was thinking too..my data pattern goes like this
ram 54
harddisk 159
can you please give me more hints on how to write the code?i tried to use if statement..but don seems to work.

[gpraghuram]

thanks.that is what i was thinking too..my data pattern goes like this
ram 54
harddisk 159
can you please give me more hints on how to write the code?i tried to use if statement..but don seems to work.

Check this

#include<stdio.h>
#include<stdlib.h>
 
int main ()
{
   FILE*pr=fopen("price.dat","r");
   double cost;
   char name[20],nm[20];
   scanf("%s",&nm);
   if(pr != NULL)
   {
       while (fscanf(pr,"%s%lf",&name,&cost) !=EOF)
       {
           if(strcmp(name,nm) == 0)
           {
               /*u have got the required item*/
               printf("iiiiii\n");
               break;
           }
           printf("Item required:");
       }
       fclose(pr);
     }
 
}
 

I think you can build ur code from here.
Thanks
Raghuram

[m1m11]

Check this

#include<stdio.h>
#include<stdlib.h>
 
int main ()
{
   FILE*pr=fopen("price.dat","r");
   double cost;
   char name[20],nm[20];
   scanf("%s",&nm);
   if(pr != NULL)
   {
       while (fscanf(pr,"%s%lf",&name,&cost) !=EOF)
       {
           if(strcmp(name,nm) == 0)
           {
               /*u have got the required item*/
               printf("iiiiii\n");
               break;
           }
           printf("Item required:");
       }
       fclose(pr);
     }
 
}
 

I think you can build ur code from here.
Thanks
Raghuram

thanks a lot man...i will try it..but..not all the command here are what i have learnt..but still..thanks a lot..