#include <iostream>
using namespace std;
double change(double pay,double total)
{
cout<<"请在以下商品中选择1-2种。a 4.5 b 5.5 c 3.4 d 6.2 e表示无, 0"<<endl;
char choice;
total=0;
for(int i=1;i<=2;i++)
{
cin>>choice;
switch(choice){
case'A':
total+=4.5;
break;
case'B':
total+=5.5;
break;
case'C':
total+=3.4;
break;
case'D':
total+=6.2;
break;
case'E':
break;
default:
cout<<"不存在该商品。只有以上5个选项";
break;
}
}
if(pay>=total){
cout<<"你的商品共:"<<total<<"元"<<endl;
cout<<"你支付了:"<<pay<<"元"<<endl;
cout<<"找零:"<<(pay-total)<<"yuan"<<endl;
}
else{ cout<<"你的商品共:"<<total<<"元"<<endl;
cout<<"你支付了:"<<pay<<"元"<<endl;
cout<<"你的付款不足"<<endl;
}
}
int main() {
double total;
change(10.0,total);
return 0;
}