Storage Class (in multiple files)

#include <stdio.h>

int p(void);

int cnt = 0;

main()

{

int k;

cnt = -10;

k = p();

printf("%d\n", k);

++cnt;

k = p();

printf("%d\n", k);

}

extern int cnt;

int p(void)

{

return ++cnt;

}

Define and initialize cnt as type int, storage class extern.

Declare cnt as extern. Thus cnt is the same variable defined in File 1.

File 1: main.c

File 2: p.c

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