The compiler ha no problem distinguishing these two function definitions:
void func(double &x){/*…*/}
void func(double x){/*…*/}

Question

Quizplus · Accepted Answer

The compiler cannot distinguish between these two function definitions because they differ only by the presence or absence of a reference (&). Overloading requires that the functions have different parameter types or numbers of parameters.

The Compiler Ha No Problem Distinguishing These Two Function Definitions