#include<iostream>
using namespace std;
class Rectangle
{
private:
double a, b, c, d;
public:
void setRectangle(double newa, double newb)
{
a = newa;
b = newb;
};
double getGirth()
{
c= (a + b) * 2;
return c;
};
double getArea()
{
d= a * b;
return d;
};
void showRectangle()
{
cout << a << " " << b << " " << c << " " << d;
};
int main()
{
Rectangle myRectangle;
myRectangle.setRectangle(2.0, 4.0);
myRectangle.getGirth();
myRectangle.getArea();
myRectangle.showRectangle();
return 0;
}
理想是输出2.00 4.00 12.00 8.00
感谢