Function overloading is a C++ programming feature that allows us to have more than one function having same name but different parameter list, when I say parameter list, it means the data type and sequence of the parameters, for example the parameters list of a function myfuncn(int a, float b) is (int, float) which is different from the function myfuncn(float a, int b) parameter list (float, int). Function overloading is a compile-time polymorphism.
Now that we know what is parameter list lets see the rules of overloading: we can have following functions in the same scope.
sum(int num1, int num2)
sum(int num1, int num2, int num3)
sum(int num1, double num2)
Function overloading example program :
#include <iostream>
using namespace std;
class Addition {
public:
int sum(int num1,int num2) {
return num1+num2;
}
int sum(int num1,int num2, int num3) {
return num1+num2+num3;
}
};
int main(void) {
Addition obj;
cout<<obj.sum(27, 18)<<endl;
cout<<obj.sum(81, 108, 9);
return 0;
}
Output :
45
198
