C Language Identifier Scope File Scope
Example
#include <stdio.h>
/* The identifier, foo, is declared outside all blocks.
It can be used anywhere after the declaration until the end of
the translation unit. */
static int foo;
void test_function(void)
{
foo += 2;
}
int main(void)
{
foo = 1;
test_function();
printf("%d\r\n", foo); //foo = 3;
return 0;
}
