Write a program to take 10 integers from file and write square of these integer in other file.

Dr. A.P.J. Abdul Kalam Technical University, Lucknow

KCS151 / KCS251 Programming for Problem Solving - Using C Language

Lab Exercises

38. Write a program to take 10 integers from a file and write the square of these integers in another file.

/*

 File: Prgrm38.c

 Author: Aditya Saini

 Date: Jan 20, 2021

 Description: Program to take 10 integers from a file and write the square of

 these integers in another file.

*/

#include <stdio.h>

int main (void)

{

     FILE *f_ptr_1, *f_ptr_2;

     char path_1[256], path_2[256];

     int num;

     int i;

     //Input first file path

     printf ("Input first file path: ");

     fflush (stdin);

     gets (path_1);

     //Open first file

     f_ptr_1 = fopen (path_1, "r");

     if (f_ptr_1 == NULL)

     {

          printf ("Error! Unable to open first file.");

          return 0;

     }

     //Input second file path

     printf ("Input second file path: ");

     fflush (stdin);

     gets (path_2);

     //Open second file

     f_ptr_2 = fopen (path_2, "w");

     if (f_ptr_2 == NULL)

     {

          printf ("Error! Unable to open second file.");

          return 0;

     }

     //Read integer from first file and write square in second file

     for (i = 0; i <= 9; i++)

     {

          if (fscanf (f_ptr_1, "%d", &num) != EOF)

               fprintf (f_ptr_2, "%d ", num * num);

          else

               break;

     }

     //Close files

     fclose (f_ptr_1);

     fclose (f_ptr_2);

     return 0;

};