FAQ: Functions: Scope & Flexibility - Default Arguments

This community-built FAQ covers the “Default Arguments” exercise from the lesson “Functions: Scope & Flexibility”.

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There’s a typo

But the following does NOT work for add_num(3); the computer assumes that 3 still corresponds to num1 :

should probably read:

But the following does NOT work for add_nums(3); the computer assumes that 3 still corresponds to num1 :

as there is no mention of add_num() anywhere else.

Why the default values should only be included on the .hpp and not the relative .cpp file too?

1 Like

I have the same doubt, have you figured it out?

Can it be specified in any of both files?

2 Likes

what does it mean by "remove all unnecessary false arguments?

add it to the bugs section in get unstuck I already had informed about the bug on the website

The default argument is false so there is no need to add false there.

@text3185827510 and @gerardomtz_h

Example :

// Declaration
void intro(std::string name, std::string lang = “C++”);

// Definition
void intro(std::string name, std::string lang) {
std::cout << "Hi, my name is "
<< name
<< " and I’m learning "
<< lang
<< “.\n”;
}

You have to ‘DECLARE’ things in declaration not in definition because you had already ‘declared’ it while declaring your function.