Count Undeclared?!?

[Saint]

I'm using g++ in Redhat linux and I have code like this:

#include <iostream>

int main()
{

cout << "Hello World!";
return 0;
}

but I get a count undeclared. Does iostream not have cout in it?

[John]

iostream does have cout in it lib, but you have to declare the namespace or whatever its called...try adding this below the header includes

using std::cout

[WingedPanther]

Originally Posted by Saint

I'm using g++ in Redhat linux and I have code like this:

#include <iostream>

int main()
{

cout << "Hello World!";
return 0;
}

but I get a count undeclared. Does iostream not have cout in it?

Your error is probably "cout undeclared". cout is located in the std namespace, so your coude needs to either be

#include <iostream>

int main()
{

std::cout << "Hello World!";
return 0;
}

or

#include <iostream>

using std::cout;
int main()
{

cout << "Hello World!";
return 0;
}

[dirkfirst]

I'm fairly sure he meant cout

[Saint]

Whoops! I meant cout. When did linux start using Namespaces? I thought this was a microsoft thing. What is a namespace exactly, just another name for a class, right?

[WingedPanther]

Namespaces are a way to collect code from multiple files under an umbrella. For example, the standard library is in namespace std::. The advantage is that you are unlikely to accidentally use both the same namespace AND same variable/class name. But without namespaces you could easily use a somewhat obscure variable name and have a definition collision.

Namespaces are NOT part of linux, they are part of C++.