C - Global variables
From EdWiki
Global variables
- Any variable which is defined outside of any function is called a global variable.
- Global variables remain in existence through out the life of the program.
- Any function may access the global variable(s)
- Global variable(s) can be made accessible to other source files by an external linkage.
- Global variable(s) provide an alternative to functions arguments and return values for communicating data between functions.