/in/foo.cc: In function 'int main()':
/in/foo.cc:68:13: warning: unused variable 'x' [-Wunused-variable]
         int x, y, z;
             ^
/in/foo.cc:68:16: warning: unused variable 'y' [-Wunused-variable]
         int x, y, z;
                ^
/in/foo.cc:68:19: warning: unused variable 'z' [-Wunused-variable]
         int x, y, z;
                   ^