#include<stdio.h>
#include<stdarg.h>

void minprintf(char *fmt, ...);

int main()
{

 char *s = "Hello world\n";
 int iv = 32;
 float ifv = 25.260;
 minprintf("%s",s);
 minprintf("%d\n",iv);
 minprintf("%f\n",ifv);
 return 0;

}

void minprintf(char *fmt, ...)
{
  va_list ap;
  char *p, *sval;
  int ival;
  double dval;

  va_start(ap, fmt);

  for (p=fmt; *p; p++)
  {
    if (*p != '%')
     {
       putchar(*p);
       continue;
     }

    switch(*++p)
      {
         case 'd':
                ival = va_arg(ap, int);
                printf("%d", ival);
                break;
         case 'f':
                dval = va_arg(ap, double);
                printf("%f", dval);
                break;
   case 's':
                for (sval = va_arg(ap, char*); *sval; sval++)
                 putchar(*sval);
                break;
        default:
                putchar(*p);
                break;
        }
    }
 va_end(ap);
}