cpp
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#include <iostream>
using namespace std;
class Rec
{
int length;
int width;
public:
void set_length(int l); //设置长度
void set_width(int w); //设置宽度
int get_length(); //获取长度
int get_width(); //获取宽度
void show(); //输出周长和面积
};
void Rec::set_length(int l)
{
length=l;
}
void Rec::set_width(int w)
{
width=w;
}
int Rec::get_length()
{
return length;
}
int Rec::get_width()
{
return width;
}
void Rec::show()
{
cout << "周长=" << get_length()+get_width() <<endl;
cout << "面积=" << get_length()*get_width() <<endl;
}
int main()
{
Rec p;
p.set_length(6);
p.set_width(5);
p.show();
return 0;
}
cpp
复制代码
#include <iostream>
using namespace std;
class Yuan
{ double PI=3.14;
int r;
public:
void set_r(int sum); //设置半径
void show(); //输出周长和面积
};
void Yuan::set_r(int sum)
{
r=sum;
}
void Yuan::show()
{
cout << "周长=" << 2*PI*r << endl;
cout << "面积=" << PI*r*r <<endl;
}
int main()
{
Yuan p;
p.set_r(5);
p.show();
return 0;
}
cpp
复制代码
#include <iostream>
using namespace std;
class Car
{
string brand;
string color;
int speed;
public:
void display();
void accelerate(int amount);
void set (string b,string c,int s);
};
void Car::display()
{
cout << "品牌：" << brand <<endl;
cout << "颜色：" << color <<endl;
cout << "速度：" << speed <<endl;
}
void Car::accelerate(int amount)
{
speed=speed+amount;
}
void Car::set(string b, string c, int s)
{
brand=b;
color=c;
speed=s;
}
int main()
{
Car p;
p.set("Volvo","black",100);
p.display();
p.accelerate(20);
p.display();
return 0;
}
