Function Variables

Discussed variables the first week of class

All variables exist for the duration of their scope and can only be accessed within their scope.

Anything defined outside of a set of curly braces is in global scope.

All functions can see and modify global variables.

The following program manipulates a global variable

int x = 5;

void func1 () { x = 1; }

void func2 () { printf("%d\n", x); }

int main () {
   func1();
   func2();
   return (0);
}

Global variables are normally considered bad practice if they can at all be avoided as it makes debugging difficult.