作业4_20

#include<iostream>using namespace std;class book{private:int qu;int price;public:book(int q,int p){qu=q;price=p;}void show_money(){cout<<qu*price<<endl;}};int main(){book b[5]={book(1,10),book(2,20),book(3,30),book(4,40),book(5,50)};int i;book *p;p=&b[4];for(i=0;i<5;i++){p->show_money();p--;}return 0;}