C++ Function Overloading Conditions

In C++, function overloading refers to the ability to have multiple functions with the same name in the same scope, but with different parameter lists. The conditions for function overloading are as follows:

1. For function overloading to occur, the function names must be the same.
2. The parameter list must be different: The parameter list for a function must be different, including the parameter type, number of parameters, or the order of parameters.
3. In C++, functions cannot be overloaded based solely on differences in return types. If two functions have the same name and parameter list but different return types, the compiler will produce an error.
4. The const keyword: const keyword has no effect on function overloading because it is only a part of the function signature and does not affect whether the function is overloaded or not.

Example:

The cat is sitting on the mat = The cat is seated on the rug.

void print(int a);
void print(float a);
void print(double a, double b);
// 上面的例子演示了函数重载，print 函数名称相同，但参数列表不同，因此实现了函数重载。

In conclusion, the conditions for function overloading include having the same function name but different parameter lists. In C++, function overloading is essentially done by changing the parameters in the function’s list to distinguish between different functions.