/in/foo.cc: In function 'int main()':
/in/foo.cc:30:6: warning: unused variable 'tempa' [-Wunused-variable]
  int tempa,tempb;
      ^~~~~
/in/foo.cc:30:12: warning: unused variable 'tempb' [-Wunused-variable]
  int tempa,tempb;
            ^~~~~