/in/foo.cc: In function 'int main()':
/in/foo.cc:97:13: warning: variable 'c11' set but not used [-Wunused-but-set-variable]
     Complex c11=c1;
             ^~~
/in/foo.cc:98:13: warning: variable 'c22' set but not used [-Wunused-but-set-variable]
     Complex c22=c2;
             ^~~
/in/foo.cc:99:13: warning: variable 'c33' set but not used [-Wunused-but-set-variable]
     Complex c33=c3;
             ^~~