Optional argument passing in c++

Question

需要格式化，编辑需要一些时间。

Answer 1

I cannot tell what you're asking but I'm going to attempt to interpret it as what I read..

void function_one(int a, int b = 3);
void function_two(int a);

void function_one(int a, int b)
{
    function_two(b); //pass second argument to function two..
}

void function_two(int a)
{
    function_one(5);
}

Note that the above is infinite recursion due not having a base case condition.