Question

高分悬赏,一道C++题!

构建一个类book,其中含有两个私有数据成员qu和price,建立一个有5个元素的数组对象,将qu初始化为1～5,将price初始化为qu的10倍.显示每个对象的qu*price值.

Answer 1

#include<iostream.h>
int i;
class book
{
int qu;
int price;
int zhi;
public:
void qzhi()
{
qu=i+1;
}
void pzhi()
{
price=qu*10;
}
void zzhi()
{
zhi=qu*price;
}
void print()
{
cout<<"第"<<i+1<<"个值是"<<zhi<<endl;
}
};
int main()
{
int q;
book s[5];
for(i=0;i<5;i++)
{
s[i].qzhi();
s[i].pzhi();
s[i].zzhi();
s[i].print();
}
return 0;
}

Answer 2

#include<iostream.h>
int gInt=0;
class book
{
private:
int qu;
int price;
int iIndex;
public:
book()
{
iIndex=gInt++;
qu=iIndex+1;
price=qu*10;
}
void print()
{
cout<<"第"<<iIndex+1<<"个值是"<<price<<endl;
}
};
int main()
{
book s[5];
for(int i=0; i<5; i++)
{
s[i].print();
}
return 0;
}

Answer 3

#include <iostream>
using namespace std;
class Book
{
public:
Book(){}; //构造函数
void SetData(float q,float p){qu=q;price=p;} //可用于修改qu,price的值
void ShowResult(int index) //显示 qu*price
{
cout<<"qu*price["<<index<<"]: "<<qu*price<<endl;
}
private:
float qu,price;
};
int main()
{
Book obj[5];
for(int i=0;i<=4;i++)
{
obj[i].SetData((i+1)*1,(i+1)*10); //初始化
obj[i].ShowResult(i+1); //显示qu*price
}
return 0;
}