/in/ex2.c: In function 'circularShift':
/in/ex2.c:18:8: error: 'j' undeclared (first use in this function)
        j = 0;
        ^
/in/ex2.c:18:8: note: each undeclared identifier is reported only once for each function it appears in
/in/ex2.c: In function 'main':
/in/ex2.c:29:14: error: unused parameter 'argc' [-Werror=unused-parameter]
 int main(int argc, char *argv[])
              ^~~~
cc1: all warnings being treated as errors