C Variadic Function

For example, printf can have a variable amount of arguments.

• Must have at least one argument in the call and prototype, and they must be of the same type

Example

A function that prints a variable amount of arguments. Va expressions are macros In this example, we print until we hit a negative int (this is an arbitrary choice)

void printargs (int arg1, ...) {
	va_list ap
	int i;
	va_start(ap, arg1);
	for (i = arg1; i >= 0; i = va_arg(ap, int)) {
		printf("%d ", i);
	}
	v_end(ap);
}