C++学习日志39------类中函数的重定义

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一、类中函数的重定义

#include
#include
#include"Shape.h"
#include"rectangle.h"
#include"circle.h"

int main()
{
	Shape s1{ Color::blue,false };
	Circle c1{ 3.9,Color::green,true };
	Rectangle r1{ 4.0,1.0,Color::white,true };

	std::cout << s1.toString() << std::endl;
	std::cout << c1.toString() << std::endl;
	std::cout << r1.toString() << std::endl;

	std::cout << "c1 area:" << c1.getArea() << std::endl;
	std::cout << "r1 area:" << r1.getarea() << std::endl;

	std::cin.get();
}

结果如上图所示。

二、相关文件

#include "Shape.h"
Shape::Shape(Color color_, bool filled_)
{
	color = color_;
	filled = filled_;
}
Color Shape::getColor() { return color; }
void Shape::setColor(Color color_) { color = color_; }
bool Shape::isFilled() { return filled; }
void Shape::setFilled(bool filled_) { filled = filled_; }

string Shape::toString()
{
	std::array<string, 6> c{ "white"s,"black"s, "red"s, "green"s, "blue"s, "yellow"s, };
	return "Shape :  " + c[static_cast<int>(color)] + "  " + (filled ? "filled"s : "not filled"s);
}
string Shape::colorTostring()
{
	return colorNames[static_cast<int>(color)];
}

string Shape::filledToString()
{
	return (filled ? "filled"s : "not filled"s);
}

#include"rectangle.h"
Rectangle::Rectangle(double w, double h, Color c, bool f) :width{ w }, height{ h }, Shape{c,f}{}
double Rectangle::getWidth() const
{
    return width;
}

void Rectangle::setWidth(double width)
{
    this->width = width;
}

double Rectangle::getHeight() const
{
    return height;
}

void Rectangle::setHeight(double height)
{
    this->height = height;
}

double Rectangle::getarea()
{
    return width * height;
}

string Rectangle::toString()
{
    return("Rectangle:width " + std::to_string(width) + " ," + "height " + std::to_string(height) + "," +
        colorTostring() + " " + filledToString());
    

}

#include"circle.h"
Circle::Circle()
{
	radius = 1.0;
}
Circle::Circle(double radius_, Color color_, bool filled_) :Shape{ color_, filled_ }
{
	radius = radius_;
}
double Circle::getArea()
{
	return (3.14 * radius * radius);

}
double Circle::getRadius() const
{
	return radius;
}

Circle& Circle::setRadius(double radius)
{
	this->radius = radius;
	return (*this);
}

string Circle::toString()
{
	return ("Circle:radius" + std::to_string(radius) + "," + colorTostring() + " " + filledToString());

}

#pragma once
#include"Shape.h"
class Circle:public Shape
{
private:
	double radius;
public:
	Circle();
	Circle(double radius_, Color color_, bool filled_);
	double getArea();
public:
	double getRadius() const;
	Circle& setRadius(double radius);
	string toString();
};

#pragma once
#include
#include
#include
using std::string;
using namespace std::string_literals;
enum class Color
{
	white,black,red,green,blue,yellow,

};

class Shape
{
private:
	Color color{ Color::black };
	bool filled{ false };
	std::array<string, 6>colorNames{ "white"s,"blcak"s, "red"s, "green"s, "blue"s, "yellow"s, };
public:
	Shape() = default;
	Shape(Color color_, bool filled_);

	Color getColor();
	void setColor(Color color_);
	bool isFilled();
	void setFilled(bool filled_);

	string filledToString();
	string colorTostring();
	string toString();


};

#pragma once
#include"Shape.h"
//创建Rectangle类，从Shape继承
class Rectangle : public Shape
{
private:
	double width{ 1.0 };
	double height{ 1.0 };
public:
	Rectangle() = default;
	Rectangle(double w, double h,Color c,bool f);

    double getWidth() const;
    void setWidth(double width);

    double getHeight() const;
    void setHeight(double height);

	double getarea();
	string toString();
};