/in/foo.cc: In function 'int main()':
/in/foo.cc:12:9: warning: unused variable 'jj' [-Wunused-variable]
   int j,jj=1;
         ^~
/in/foo.cc:8:8: warning: unused variable 'b' [-Wunused-variable]
  int a,b,c=1,d,e,f;
        ^
/in/foo.cc:8:14: warning: unused variable 'd' [-Wunused-variable]
  int a,b,c=1,d,e,f;
              ^
/in/foo.cc:8:16: warning: unused variable 'e' [-Wunused-variable]
  int a,b,c=1,d,e,f;
                ^
/in/foo.cc:8:18: warning: unused variable 'f' [-Wunused-variable]
  int a,b,c=1,d,e,f;
                  ^