水果收银机.txt

水果收银机源代码.用C++写的.大家给点意见.

水果收银机

编写收银机程序：为某个水果店售货员算账，苹果每斤2.8元，香蕉每斤1.7元，芒果每斤6.5元。要求输入各种水果的重量，打印应付的钱数，再输入顾客付款数，打印应找的钱数。

分析：因为有不同种类的水果，需要用switch语句进行选择；而且这个水果店收银机一直是开着的，直到关门才结束，需要用循环语句保证程序一直运行。程序包括while,if-else和switch语句的嵌套。


#include<iostream.h>
const float APPLE=2.8;
const float BANANA=1.7;
const float MANGO=6.5;
void main()
{  int c;
   char stop='n';
   double weight,pay,money,change;
   cout<<"welcome to our fruit store,press any key to begin!(^_^)"<<endl;
   while(1)
{       cout<<"--------------press \'y\' to close the fruit store-------\n";
        stop=getchar();
        if(stop=='y'||stop=='Y') break;
        else
        {    cout<<"Please choose you fruit class"<<endl;
             cout<<"APPLE \t----1 \t 2.8yuan/500g\n
                    BANANA \t----2 \t 1.7yuan/500g\n
                    MANGO \t----3 \t 6.5yuan/500g\n";
             cin>>c;
             cout<<"Please input the weight:";
             cin>>weight;
             switch(c)
{                 case 1: pay=weight * APPLE; break;
                  case 2: pay=weight * BANANA; break;
                  case 3: pay=weight * MANGO; break;
                  default: cout<<"choose error \n"; goto loop;


}
        cout<<"You should pay"<<pay<<"yuan.\n please input your money:";
        cin>>money;
        change=money-pay;
        cout<<"\n Your money is \t"<<money<<", you shoule pay \t"<<pay<<".\n Your change is"<<change<<endl;
   loop:cout<<"Thank you!  -----  next customer,please!\n";


}


}


}