Question

C++题：定义一个圆类,数据成员有颜色、圆心坐标,半径（急）

定义一个圆类,数据成员有颜色、圆心坐标,半径,成员函数有构造函数（右个参数）,拷贝构造函数,设置圆的各种参数的函数，显示圆的各种参数的函数，计算圆的面积的函数，计算圆的周长的函数。并编写一个主函数对所定义的圆类进行测试。。

Answer 1

#include <iostream>
#include <string.h>
using namespace std;

class Circle
{
public:
Circle(){}
Circle(Circle& c)
{
strcpy(color, c.color);
x = c.x;
y = c.y;
radius = c.radius;
}
void setCircle(char* clr, int xc, int yc, int r)
{
strcpy(color, clr);
x = xc;
y = yc;
radius = r;
}
void getCircle()
{
cout << "color: " << color << endl;
cout << "the centre of the circle: (" << x << ", " << y << ")" << endl;
cout << "radius: " << radius << endl;
}
double perimeter()
{
return 2 * 3.14 * radius;
}
double area()
{
return 3.14 * radius * radius;
}
private:
char color[5];
int x;
int y;
int radius;
};

int main()
{
Circle c1;
c1.setCircle("红", 4, 5, 3);
Circle c2(c1);
c2.getCircle();
cout << "perimeter: " << c2.perimeter() << endl;
cout << "area: " << c2.area() << endl;
return 0;
}