Using variable from other files.

[DaSpirit]

I've noticed that my draw function in my header doesn't work because I'm trying to use a variable in the header that is used in my main.cpp file. Is it possible to put these functions in other files other than the main.cpp file? Will using another .cpp file work? Why would you use multiple .cpp files? I just don't want my files starting to flood with text...

[Disch]

Don't use globals. Pass the variable you need to the function. Then it will work in any file. And it will work with any variable, which makes your code more reusable.

// BAD

int foo;

void somefunc()
{
  cout << foo;
}

int main()
{
  somefunc();
}

// GOOD

void somefunc(int foo)
{
  cout << foo;
}

int main()
{
  int foo;
  somefunc(foo);
}