Source:
// right triangle in a derived class rectangle, rectangular class parameter is also input from the keyboard. These classes are designed and tested their function.
#include < iostream >
#include < cmath >
using namespace std;
class Line // base class segment
{
protected:
double sizeA;
public:
Line()
{
cout << "length of the input segment:" << endl;
cin >> sizeA;
}
Line(double a)
{
sizeA = a;
}
double getLength()
{
return sizeA;
}
};
class Triangle: public Line // triangle class
{
protected:
double sizeB, sizeC;
public:
Triangle()
{
cout << "Enter the length of the line:" << endl;
cin >> sizeB;
sizeC = sqrt(sizeB * sizeB + sizeA * sizeA);
}
void printSize()
{
cout << "right triangle, the three sides are:";
cout << "A: " << sizeA << ", b: " << sizeB << ", C: " << sizeC << endl;
}
};
class Rectangle: public Triangle // rectangle class
{
protected:
double sizeD;
public:
Rectangle()
{
sizeC = sizeA;
sizeD = sizeB;
}
void printSize()
{
cout << "rectangular, four sides are:";
cout << "A: " << sizeA << ", b: " << sizeB << ", C: " << sizeC << ", D: " << sizeD << endl;
}
};
void main()
{
Line *l = new Line();
cout << "segment length:" << l-> getLength () << endl;
Triangle *t = new Triangle();
t->printSize();
Rectangle *r = new Rectangle();
r->printSize();
system("pause");
}
operation result:
