Question

Question #1:
if I have a C++ code like this

#include <iostream>

using namesapce std;

int main() {
  int a;
  cin >> a;
  cout << a << endl;
  return 0;
}

I don’t know if this is called (debugging, compiling, or building), but I just want to run this program inside gvim so I can give it the input and see the output, and see errors such as “missing ‘;’ ” or “missing ‘}’ ” (like what happens when I click F9 in “Code::Blocks”).
exe file, and other things are not important for me.

Question #2:
if I have a C++ code that I write every time like this

#include <iostream>
#include <sstream>
#include <string>
#include <vector>

using namespace std;

How can I make vim insert this code every time I open a .cpp file with vim ?

I have Windows 7 32-bit and my .vimrc file is the default one that comes when I install vim.
Please be as detailed as possible.

Answer 1

Probably this is what you are looking for

Vi and Vim Autocommand: 3 Steps to Add Custom Header To Your File Automatically