/in/foo.cc: In function 'int main()':
/in/foo.cc:5:10: warning: unused variable 'c' [-Wunused-variable]
  int a,b,c,d,e,f,g,h;
          ^
/in/foo.cc:5:12: warning: unused variable 'd' [-Wunused-variable]
  int a,b,c,d,e,f,g,h;
            ^
/in/foo.cc:5:14: warning: unused variable 'e' [-Wunused-variable]
  int a,b,c,d,e,f,g,h;
              ^
/in/foo.cc:5:16: warning: unused variable 'f' [-Wunused-variable]
  int a,b,c,d,e,f,g,h;
                ^
/in/foo.cc:5:18: warning: unused variable 'g' [-Wunused-variable]
  int a,b,c,d,e,f,g,h;
                  ^
/in/foo.cc:5:20: warning: unused variable 'h' [-Wunused-variable]
  int a,b,c,d,e,f,g,h;
                    ^