how do you test what something does

[lurksalot]

I know to build a program you use code blocks, but how would you test something like

3+4;

I know it's going to be a 7, but how would you run it.
I tried notepad++, but it just gives me a new line.

[Xhalite]

Try this:

#include <iostream>

using namespace std;

int main() {
	cout << 3 + 4 << endl; //Prints 3 + 4 to console
	cin.get(); //Press enter to exit

	return 0;
}

To run it, compile it from your ide or use mingw32 if you're using notepad++ and type into the msys prompt:

g++ example.cpp -o example.exe -static-libgcc -static-libstdc++

Though, I recommend you just use an IDE, though seperate text editor and compiler can be fun.