Introduction to C++ Function Overloading: Different Implementations of Functions with the Same Name

Function overloading in C++ allows defining functions with the same name within the same scope, where the parameter lists differ. The core of overloading lies in differences in the number, type, or order of parameters (return type is irrelevant). Its role is to simplify code and avoid repeating names for functions with similar functionalities. For example, `add(int, int)` and `add(double, double)` can handle addition for different types. Another example is `max(int, int)` and `max(double, double)` which can compare the maximum values of integers and floating-point numbers respectively, and `sum(int, int)` and `sum(int, int, int)` support summation with different parameter counts. Note: Overloading does not occur if only the return type differs (e.g., `int` and `double` versions of `max`). However, parameter order differences (e.g., `func(int, double)` and `func(double, int)`) do constitute overloading. When using overloading, avoid excessive use. The compiler will match the most appropriate version based on the parameter types, number, and order.