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x
14
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extern int a;5
6
int main(int argc, char *argv[])7
{8
// write code here9
printf("%d\n", a);10
11
return EXIT_SUCCESS;12
}13
14
static int a = 10;$ gcc prog.c -Wall -Wextra -std=c11
Start
prog.c: In function 'main':
prog.c:6:14: warning: unused parameter 'argc' [-Wunused-parameter]
6 | int main(int argc, char *argv[])
| ~~~~^~~~
prog.c:6:26: warning: unused parameter 'argv' [-Wunused-parameter]
6 | int main(int argc, char *argv[])
| ~~~~~~^~~~~~
prog.c: At top level:
prog.c:14:12: error: static declaration of 'a' follows non-static declaration
14 | static int a = 10;
| ^
prog.c:4:12: note: previous declaration of 'a' was here
4 | extern int a;
| ^
prog.c:14:12: warning: 'a' defined but not used [-Wunused-variable]
14 | static int a = 10;
| ^
1
Finish