Usefulness. Having functions return stuff, instead of passing arguments by reference/pointer, is specially useful when you can use the return value in an expression, or argument to another function ...

Separating interface from implementation has many practical benefits. Here’s a simple way to do just that, in ANSI-standard C code. How do you organize medium-sized or larger C programs? Few C ...

The first programming languages had procedure calls, or subroutine calls instead of function calls. They are declared like a goto label is declared in C/C++, the only difference is that a special ...