喝汽水，1瓶汽水1元，2个空瓶可以换一瓶汽水，给20元，可以喝多少汽水,用C语言编写

#include <stdio.h>
int main()
{
	int money = 0;
	int empty = 0;
	int total = 0;
	scanf("%d", &money);
	total += money;
	empty += money;
	while (empty >= 2)
	{
		total += empty / 2;
		empty = empty / 2 + empty % 2;

	}
	
	printf("total = %d\n ", total);
	return 0;
}