作业4.20

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