Be Careful with Parameterless C Functions

When a C function does not take any arguments, it might be tempting to simply declare it as e.g. int foo();.

For historical reasons the compiler interprets this declaration as a function with an unknown list of arguments. The compiler essentially treats it as int foo(...);. This can cause issues and allows calling it by accident with arguments.

The correct way to declare a C function with no arguments is as int foo(void);