/in/foo.cc: In function 'int main()':
/in/foo.cc:5:18: warning: unused variable 'f' [-Wunused-variable]
  int a,b,c,d=0,e,f,g;
                  ^
/in/foo.cc:5:20: warning: unused variable 'g' [-Wunused-variable]
  int a,b,c,d=0,e,f,g;
                    ^