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Learn Object-Oriented Programming in C++

Overloading Functions

Explore the concept of function overloading in C++, which enables you to define multiple versions of a function with different argument types. Understand how this feature helps write modular, memory-efficient code, and prepares you for advanced topics like polymorphism in object-oriented programming.

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Each function has a specific number of arguments which have to be passed when calling it. If we increase or decrease the number of arguments in the call, we’ll get a compilation error:

C++
#include <iostream>
using namespace std;
double product(double x, double y){
  return x * y;
}
int main() {
  cout << product(10, 20) << endl; // Works fine
  cout << product(10) << endl; // Error!
}

The compiler doesn’t know how to handle arguments it wasn’t expecting. However, one of the coolest things we can do with functions is that we can ...