Question

How to overload class constructor in C++

Answer 1

#include <iostream>

using std::cout;
using std::endl;

class Rectangle {
	int width, height;
public:
	Rectangle();
	Rectangle(int, int);
	int area(void);
};

Rectangle::Rectangle() {
	width = 7;
	height = 3;
}

Rectangle::Rectangle(int w, int h) {
	width = w;
	height = h;
}

int Rectangle::area(void) { 
	return (width * height); 
}

int main() {
	Rectangle rect1;
	cout << rect1.area() << endl;

	Rectangle rect2(9, 5);
	cout << rect2.area() << endl;

	return 0;
}

/*
run:

21
45

*/

 

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