====== Variables in C ======

===== Static global variables =====
Test case: Code for c1.c: <code c>#include <stdio.h>

static int stat;

int getSetStat1(int n) {
    int v = stat;
    stat = n;
    return v;
}

int main(void) {
    getSetStat2(4);
    getSetStat1(3);
    printf("stat.1=%i, stat.2=%i\n",stat, getSetStat2(5));
    return 0;
}</code>
Code for c2.c: <code c>static int stat;

int getSetStat2(int n) {
    int v = stat;
    stat = n;
    return v;
}</code>

Compile with ''gcc c2.c c1.c''. Output: ''stat.1=3, stat.2=4''.

===== Keyword Static in functions =====
<code c>#include <stdio.h>

void f() {
    static int x;
    printf("%i\n", x);
    x = 5;
    return;
}


int main(void) {
    f();
    f();
    return 0;
}</code>

The code prints
  0
  5