The word polymorphism means having many forms. In simple words, we can define polymorphism as the ability of a message to be displayed in more than one form. Real life example of polymorphism, a person at the same time can have different characteristic. Like a man at the same time is a father, a husband, an employee. So the same person posses different behavior in different situations. This is called polymorphism. Polymorphism is considered as one of the important features of Object Oriented Programming. In C++ polymorphism is mainly divided into two types: Compile time Polymorphism Runtime Polymorphism Compile time polymorphism: This type of polymorphism is achieved by function overloading or operator overloading. Function Overloading: When there are multiple functions with same name but different parameters then these functions are said to be overloaded. Functions can be overloaded by change in number of arguments or/and change in type of arguments. Rules of Function Overloading filter_none edit play_arrow brightness_4 // C++ program for function overloading #include using namespace std; class Geeks { public: // function with 1 int parameter void func(int x) { cout using namespace std; class Complex { private: int real, imag; public: Complex(int r = 0, int i =0) {real = r; imag = i;} // This is automatically called when '+' is used with // between two Complex objects Complex operator + (Complex const &obj) { Complex res; res.real = real + obj.real; res.imag = imag + obj.imag; return res; } void print() { cout using namespace std; class base { public: virtual void print () { coutprint(); // Non-virtual function, binded at compile time bptr->show(); return 0; } Output: print derived class show base class To learn runtime polymorphism in details visit this link.