Overloading

Functions in C

In C, everything is simple

• A function has a name

• The name is the only thing by which functions are distinguished

• Not the return type, nor the paraameters

Declaration of x

int x(int i);

Ok

int ret = x(42);

2x Error

char *ret = x("huh?");

Error: x declared twice

char *x(char* str);

Functions in C++ — Overloading

C++: better

Two declarations of x

int x(int i);
char *x(const char *str);

Ok

int ret = x(42);

Ok

char *ret = x("huh?");

Error: no appropriate x found

char *ret = x(42);