[SOLVED] std::cout error

Djyou · 10-31-2013, 10:10 PM

Okay so I'm rebuilding an old counting program of mine because I want to assemble a private header file(Some function I just want to be able to call whenever instead of having to keep them in some random file somewhere on my drive to copy paste whenever I need them. I'm trying at this moment to get std::cout to work so here be the code.

Code:

#include <iostream> //I think I need this for this program
#define infinite while( 1 < 2 )
int count = 0;

int main() {
	infinite{
		std::cout << count;
		count++;
	}
}

error is

Code:

/tmp/cc9iYJpZ.o: In function `main':
counter.cpp:(.text+0xd): undefined reference to `std::cout'
counter.cpp:(.text+0x12): undefined reference to `std::ostream::operator<<(int)'
/tmp/cc9iYJpZ.o: In function `__static_initialization_and_destruction_0(int, int)':
counter.cpp:(.text+0x4a): undefined reference to `std::ios_base::Init::Init()'
counter.cpp:(.text+0x59): undefined reference to `std::ios_base::Init::~Init()'
collect2: error: ld returned 1 exit status

What's the problem here? did I forget something somewhere it's been awhile since I've done cpp coding. At all.

--Djyou

Guttorm · 11-01-2013, 05:33 AM

Hi

Did you try to compile it with gcc? Try g++ instead and it will work.

saopedrodaserra · 11-01-2013, 05:58 AM

int main(void)
{
return 0;
}

// the function main returns an integer, "int main()", so you must do this and i dont know whats going to be with the infinite loop and count++, i // think depends on the o.s. and the compiler. And try to do a good code. "KISS" rule, "keep it simple stupid".

Djyou · 11-01-2013, 09:08 PM

@Guttorm
Your solution worked. However why? I can't call the question answered until I know why it worked after such an seemingly minor change. Though I did mark your answer helpful.

astrogeek · 11-01-2013, 09:13 PM

Quote:

Originally Posted by Djyou

@Guttorm
Your solution worked. However why? I can't call the question answered until I know why it worked after such an seemingly minor change. Though I did mark your answer helpful.

Could this be it, from man gcc:

Code:

However, the use of gcc does not add the C++ library.  g++ is a program that calls GCC and treats .c, .h
and .i files as C++ source files instead of C source files unless -x is used, and automatically speci-
fies linking against the C++ library.  This program is also useful when precompiling a C header file
with a .h extension for use in C++ compilations.  On many systems, g++ is also installed with the name
c++.

Djyou · 11-01-2013, 10:14 PM

Thanks Astro. Will mark as answered now.