Adding C++ standard header files to the project

[swarupa]

[I]Hi all ,

Iam trying to add standard c++ header file to my project.Here is my code

#include <iostream>
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
 
 
    cout << "hello" ;
 
    return a.exec();
}

#include <iostream>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();


    cout << "hello" ;

    return a.exec();
}

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Im adding iostream though i'm getting error.
errors are : 'cout' was not declared in this scope
cout << "hello" ;
^
But when i put the cursor on the include file it is showing the correct path of the iostream standard c++ file /usr/include/c++/4.8/iostream ^

then how to solve error

[anda_skoa]

cout is not a global symbol, it is part of the "std" namespace.
E.g.

std::cout << "hello";

std::cout << "hello";

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Cheers,
_

[froeben]

Otherwise,you could make a

using namespace std;

using namespace std;

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which also gives you the right scope.
From programming point of view this should be avoided and the solution of "anda_skoa" is the best one!!!