模拟一个简单收银系统

System.out.println("请输入客户所买的商品单价：");

Scanner s = new Scanner(System.in);

int e = s.nextInt();
System.out.println("请输入够买数量：");
int b = s.nextInt();
System.out.println("共计："+e*b);
System.out.println("请输入客户付款金额：");
int t = s.nextInt();
int k = t- e*b;


System.out.println("应找零："+k);
System.out.println("谢谢惠顾");