/in/foo.cc: In function 'int main()':
/in/foo.cc:60:8: warning: unused variable 'j' [-Wunused-variable]
  int i,j,ix,iy,iz,iu,lim;
        ^
/in/foo.cc:60:13: warning: unused variable 'iy' [-Wunused-variable]
  int i,j,ix,iy,iz,iu,lim;
             ^~
/in/foo.cc:60:16: warning: unused variable 'iz' [-Wunused-variable]
  int i,j,ix,iy,iz,iu,lim;
                ^~
/in/foo.cc:60:19: warning: unused variable 'iu' [-Wunused-variable]
  int i,j,ix,iy,iz,iu,lim;
                   ^~