Program5.c

#include<stdio.h>
#include<stdlib.h>
#include<dirent.h>
#include <errno.h>
#include<string.h>
#define DATA_SIZE 1000

void copyfun(){
char ch, source_file[20], target_file[20];
       FILE *source, *target;
       printf("Enter name of file to copy\n");
      scanf("%[^\n]%*c",source_file);
       source = fopen(source_file, "r");
       if (source == NULL)
       {
          printf("Press any key to exit...\n");
          exit(EXIT_FAILURE);
       }
       printf("Enter name of target file\n");
       scanf("%[^\n]%*c",target_file);
       target = fopen(target_file, "w");
       if (target == NULL)
       {
          fclose(source);
          printf("Press any key to exit...\n");
          exit(EXIT_FAILURE);
       }
       while ((ch = fgetc(source)) != EOF)
          fputc(ch, target);
     
       printf("File copied successfully.\n");
       fclose(source);
       fclose(target);
}
int main()
{
copyfun();
}