#include <stdio.h> 
#include <fcntl.h> 
#include <io.h> 

int main(void) 
{ 
   int result; 

   result = setmode(fileno(stdprn), O_TEXT); 
   if (result == -1) 
      perror("Mode not available\n"); 
   else 
      printf("Mode successfully switched\n"); 
   return 0; 
}