CODEWITHSUNDEEP
c++gcccompilationtime.hctime
Mohamadreza Nakhleh
Mohamadreza Nakhleh

Reputation: 53

source is compiled without proper #include

I have a very simple c++ source like this:

#include <iostream>
int main() {
    srand(time(NULL));
}

I am using g++ to compile like this :

g++ ./test.cpp

but it successfully compiles despite the fact that time() function is defined in ctime and it is not included with #include

my professor at university runs the code with visual studio (vc++) but he is unable to run the code without including ctime

Am I missing something here ?

by the way my g++ version is :

g++ (Ubuntu 11.2.0-7ubuntu2) 11.2.0

Upvotes: 0

Views: 539

Answers (1)

nort3x
nort3x

Reputation: 26

first of all explicitly include what you need,
(thanks to darkblueflow for pointing it out)
secondly #include order matters,

believe or not they can shadow declaration, just switch if first case doesn't work

#include <cstdlib>
#include <ctime>

// differs from

#include <ctime>
#include <cstdlib>

// in some aspects

your best shot is to include headers explicitly and keep this in mind this good luck

Upvotes: 0

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