explicit qualification in declaration of 'std::cout'

Question

The problem is really strange for me.

The code is as simple as possible:

#include <iostream>

using namespace std;

int main()
{
    cout << "Hello World!" << endl;
    return 0;
}

It is just helloworld as it is created from standart cpp project. I am sure it was worked. But after some time (really don't remember what have chaged...) I got an error:

error: explicit qualification in declaration of 'std::cout'
   extern ostream std::cout;  /// Linked to standard output

funny thing that is not in the project but inside iostream

some help? ^_^

.new information.: I was building boost library and for many of files I am getting the same error: explicit qualification in declaration of 'std::cout'

I use MinGW

What you posted is fine. You have code somewhere that you are not posting. If there is any doubt then create a new project and paste exactly that you've posted here into it. Then see if you still get the error. — Christopher Pisz, Sep 28 '17 at 20:04
Maybe related, but perhaps too fancy for a C++ beginner: https://stackoverflow.com/questions/8461832/explicit-qualification-in-declaration — Camille Goudeseune, Sep 28 '17 at 20:10
Christopher, It is a new project. The problem that I didn't change anything in it but getting the error. — Alexander Lyapin, Sep 28 '17 at 20:53

score 1 · Accepted Answer · answered Sep 28 '17 at 21:30

1

The only explanations that come to mind are:

Someone modified the standard header (accidentally?), replacing the original
```
extern ostream cout;
```
with incorrect
```
extern ostream std::cout;
```
Someone defined a macro named cout as std::cout, most likely in the compiler's command line. E.g.
```
-Dcout=std::cout
```
See http://coliru.stacked-crooked.com/a/bc5be8c7d99fed53 for example.

answered Sep 28 '17 at 21:30

AnT stands with Russia

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You are the man! Thank you! Can you imagine, I was using refactoring to change cout with std::cout... and it was also changed inside of iostream... Stupid user))) – Alexander Lyapin Sep 29 '17 at 07:13

explicit qualification in declaration of 'std::cout'

1 Answers1