Thread: Tell me about C/C++

Hmm... how to describe how namespaces work That's not important right now (and an odd concept before learning classes,) you can use cout simply and add a using namespace std at the top of the program.


Basically, there are multiple couts and the compiler has to know which one to use. std:: tells it to use the std one, you did that in your program by defining that the entire program uses std. Here's a little demonstration of namespaces.

Code:

#include <iostream>
using namespace std;

namespace Integer{
  int var = 5;
}

namespace Decimal{
  double var = 3.1416;
}

int main () {
  cout << Integer::var << endl;
  cout << Decimal::var << endl;
  return 0;
}

Weird, I know, but very useful for more advanced programming, for now you can forget what I just said