2.7付款.cpp

#include <stdio.h>
int main(void)
{
	int a,b,c,d,e;
	printf ("Enter a dollar amount: ");
	scanf ("%d",&a);
	
	b=a/20;
	c=(a-20*b)/10;
	d=(a-20*b-10*c)/5;
	e=(a-20*b-10*c-5*d)/1;
	
	printf("$20 bills: %d\n",b);
	printf("$10 bills: %d\n",c);
	printf("$5 bills: %d\n",d);
	printf("$1 bills: %d\n",e);
	
	return 0;
 }