Code for Computer Science

C++ Program to Calculate Area of Rectangle using Objects and Classes. Calculate Area of Rectangle: Area = Length * width Program Output: Source Code  #include<iostream> #include<conio.h> using namespace std; class rectangle { private: int a, b; public: void setdata(int x, int y)  { a = x; b = y; } void area() { int area = a*b; cout<<"\n Area of Rectangle = " <<area; } }; int main() { rectangle r1, r2; //objects r1.setdata(15,40);  //object r1 called setdate() cout<<"\nFor First Rectangle "; r1.area(); // object r1 calls area() r2.setdata(30,60);  //object r1 called setdate() cout<<"\nFor First Rectangle "; r2.area(); // object r1 calls area() getch(); return 0; }