#include <stdio.h>
#include <stdlib.h>

int main()
{
char ch, source_file[20], target_file[20];
FILE *source, *target;
printf("Enter name of file to copy\n");
gets(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");
gets(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);

return 0;
}