#include <stdio.h>

int main (int argc, char *argv []){

  int n, m, printf_res;
  double double_number;

  while (1){
   /* Prompt for a double, minimum field with, and precision */
   printf("Enter a double, min. field width, and precision\n");
   scanf(" %lf %d %d", &double_number, &n, &m);

   printf_res = printf("%*.*f\n", n, m, double_number);

   printf("printf returned: %d\n", printf_res);

  }

}