Mega Code Archive
Add a overloaded constructor to base class
<![CDATA[
#include <iostream>
#include <cstring>
using namespace std;
class Shape {
// private
double width;
double height;
public:
Shape() {
width = height = 0.0;
}
Shape(double w, double h) {
width = w;
height = h;
}
Shape(double x) {
width = height = x;
}
void display() {
cout << "Width and height are " << width << " and " << height << "\n";
}
double getWidth() { return width; }
double getHeight() { return height; }
void setWidth(double w) { width = w; }
void setHeight(double h) { height = h; }
};
class Triangle : public Shape {
char style[20]; // now private
public:
/* A default constructor. This automatically invokes
the default constructor of Shape. */
Triangle() {
strcpy(style, "unknown");
}
Triangle(char *str, double w, double h) : Shape(w, h) {
strcpy(style, str);
}
Triangle(double x) : Shape(x) {
strcpy(style, "isosceles");
}
double area() {
return getWidth() * getHeight() / 2;
}
void showStyle() {
cout << "Triangle is " << style << "\n";
}
};
int main() {
Triangle t1;
Triangle t2("right", 8.0, 12.0);
Triangle t3(4.0);
t1 = t2;
cout << "Info for t1: \n";
t1.showStyle();
t1.display();
cout << "Area is " << t1.area() << "\n";
t2.showStyle();
t2.display();
cout << "Area is " << t2.area() << "\n";
t3.showStyle();
t3.display();
cout << "Area is " << t3.area() << "\n";
return 0;
}
Info for t1:
Triangle is right
Width and height are 8 and 12
Area is 48
Triangle is right
Width and height are 8 and 12
Area is 48
Triangle is isosceles
Width and height are 4 and 4
Area is 8
]]>