Write a program to read number from file and then write all ‘odd’ number to file ODD.txt & all even to file EVEN.txt.

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

KCS151 / KCS251 Programming for Problem Solving - Using C Language

Lab Exercises

39. Write a program to read numbers from a file and then write all ‘odd’ numbers to file ODD.txt & all even to file EVEN.txt.

/*

 File: Prgrm39.c

 Author: Aditya Saini

 Date: Jan 20, 2021

 Description: Program to read number from file and then write all ‘odd’ number to file ODD.txt

 & all even to file EVEN.txt.

*/

#include <stdio.h>

int main (void)

{

     FILE *f_ptr, *f_odd, *f_even;

     char path_f[256], path_o[256], path_e[256];

     int num;

     //Input file path

     printf ("Input file path: ");

     fflush (stdin);

     gets (path_f);

     //Open file

     f_ptr = fopen (path_f, "r");

     if (f_ptr == NULL)

     {

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

          return 0;

     }

     //Input Odd file path

     printf ("Input Odd.txt file path: ");

     fflush (stdin);

     gets (path_o);

     //Open Odd file

     f_odd = fopen (path_o, "w");

     if (f_odd == NULL)

     {

          printf ("Error! Unable to save Odd.txt file.");

          return 0;

     }

     //Input Even file path

     printf ("Input Even.txt file path: ");

     fflush (stdin);

     gets (path_e);

     //Open Even file

     f_even = fopen (path_e, "w");

     if (f_even == NULL)

     {

          printf ("Error! Unable to save Even.txt file.");

          return 0;

     }

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

     while (fscanf (f_ptr, "%d", &num) != EOF)

     {

          if (num %2 == 0)

               fprintf (f_even, "%d ", num);

          else

               fprintf (f_odd, "%d ", num);

     }

     //Close files

     fclose (f_ptr);

     fclose (f_odd);

     fclose (f_even);

     return 0;

};