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

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

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