Program : 18

PROGRAM - 18

Write a program to print the output in the following format by giving the customer_ID as an input.

Program:

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

#include<string.h>

void main()

{

     FILE *fp;

     char line[200],ch,id[10],*f,fname[20];

     int i=0;

     clrscr();

     printf("enter source file name:");

     scanf("%s",&fname);

     fp=fopen(fname,"r");

     if(fp==NULL)

     {

           printf("file can't be opened");

           exit(0);

     }

     while((ch=fgetc(fp))!=EOF)

     {

           line[i]=ch;

           i++;

     }

     line[i]='\0';

     printf("content in file is:\n");

     printf("................................");

     printf("\nid name price");

     printf("\n...............................\n");

     printf("%s",line);

     printf("\nenter id:");

     scanf("%s",&id);

     f=strstr(line,id);

     i=(f-line);

     if(i<=strlen(line))

     {

          printf("...........\nid name price\n............\n");

           for( ;line[i]!='\n'&&line[i]!='\0';i++)

           {

                printf("%c",line[i]);

           }

     }

     else

     printf("invalid id");

     getch();

     fclose(fp);

}

/*

INPUT:enter source file name:item.txt

content in file is:

.... .......  ......

id    name   price

.... .......  ......

1.   c01     10

2.   c02     50

3.   c03     20

4.   c04     30

OUTPUT:

enter id:c02

..   .....   ....

id   item    price

..   .....   ....

c02    i2     50

*/