extern int putchar(char);
extern int putint(int);

void mini_printf(void);
int power(int, int);

int *values;
char *fmt;

void goal(int x, int n)
{
  int v[3];

  v[0] = x;
  v[1] = n;
  v[2] = power(x, n);

  values = v; fmt = "power(%d, %d) = %d\n";
  mini_printf();
}


int power(int x, int n)				/* Return the nth power of x */
{
    int pow;

    pow = 1;
    while (n > 0) {
	pow = pow * x;
	n--;
    }
    return pow;
}

void mini_printf(void)
{
    int i, j;
    
    for (i = j = 0; fmt[i] != '\0'; i++) {	/* Parse the format string */
	if (fmt[i] != '%')
	    putchar(fmt[i]);
	else {
	    i++;
	    switch (fmt[i]) {
	    case 'd':
		putint(values[j]);	/* %d: output the next int */
		j++;
		break;
	    case '%':
		putchar('%');
		break;
	    default:
		putchar(fmt[i]);
		break;
	    }
	}
    }
}