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

/* minprintf: minimal printf with varable argument list */
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 'c':
	       ival = va_arg(ap, int);
	       putchar(ival);
	       break;
	  case 'o':
	       ival = va_arg(ap, int);
	       printf("%o", ival);
	       break;
	  case 'x':
	       ival = va_arg(ap, int);
	       printf("%x", ival);
	       break;
	  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);
}

/* minscanf: minimal printf with varable argument list */
void minscanf(char *fmt, ...) {
     va_list ap;
     char *p, *sval;
     int *ival;
     double *dval;

     va_start(ap, fmt);
     for (p = fmt; *p; p++) {
	  if (*p != '%') {
	       if (getchar() != *p)
		    return;
	       continue;
	  }
	  switch(*++p) {
	  case 'c':
	       ival = va_arg(ap, (int *));
	       *ival = getchar();
	       break;
	  case 'o':
	       ival = va_arg(ap, (int *));
	       scanf("%o", ival);
	       break;
	  case 'x':
	       ival = va_arg(ap, (int *));
	       scanf("%x", ival);
	       break;
	  case 'd':
	       ival = va_arg(ap, (int *));
	       scanf("%d", ival);
	       break;
	  case 'f':
	       dval = va_arg(ap, (double *));
	       scanf("%f", dval);
	       break;
	  case 's':
	       for (sval = va_arg(ap, char *); *sval=getchar(); sval++);
	       break;
	  default:
	       if (getchar != *p)
		    return;
	       break;
	  }
     }
     va_end(ap);
}