作业4.19

参照书本p89，例4.3

#include<iostream>using namespace std;class book{public:book(int a,int b){qu=a;price=b;}int get(){return (qu*price);}private:int qu;int price;};int main(){book b[5]={book(1,10),book(2,20),book(3,30),book(4,40),book(5,50)};for(int i=0;i<5;i++)cout<<b[i].get()<<endl;system("pause");return 0;}