/in/ex1.c: In function 'main':
/in/ex1.c:12:14: error: unused parameter 'argc' [-Werror=unused-parameter]
 int main(int argc, const char * argv[]) {
              ^~~~
/in/ex1.c:12:33: error: unused parameter 'argv' [-Werror=unused-parameter]
 int main(int argc, const char * argv[]) {
                                 ^~~~
cc1: all warnings being treated as errors