<img src="https://img-blog.csdn.net/20150419170526210" alt="" />#include <iostream>
using namespace std;
class Product
{ public:
Product(int n,int q,float p):num(n),quantity(q),price(p){};
void total();
static float average();
static void display();
private:
int num;
float quantity;
float price;
static float discount;
static float sum;
static int n;
};
void Product::total()
{
float rate=1.0;
if(quantity>10)rate=0.98*rate;
sum=sum+quantity*price*rate*(1-discount);
n=n+quantity;
}
void Product::display()
{
cout<<sum<<endl;
cout<<average<<endl;
}
float Product::discount=0.05;
float Product::sum=0;
int Product::n=0;
int main()
{
Product Prod[3]=
{Product(101,5,23.5),Product(101,12,24.56),Product(103,100,21.5)
};
for(int i=0;i<3;i++)
Prod[i].total();
Product::display();
return 0;
}
9.cpp
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