/in/foo.cc: In function 'int main()':
/in/foo.cc:7:15: warning: unused variable 'b' [-Wunused-variable]
  double c1,c2,b,a,z1,z2,z3,t90,t108,t72,r;
               ^
/in/foo.cc:7:17: warning: unused variable 'a' [-Wunused-variable]
  double c1,c2,b,a,z1,z2,z3,t90,t108,t72,r;
                 ^
/in/foo.cc:7:22: warning: unused variable 'z2' [-Wunused-variable]
  double c1,c2,b,a,z1,z2,z3,t90,t108,t72,r;
                      ^~
/in/foo.cc:7:25: warning: unused variable 'z3' [-Wunused-variable]
  double c1,c2,b,a,z1,z2,z3,t90,t108,t72,r;
                         ^~
/in/foo.cc:7:37: warning: variable 't72' set but not used [-Wunused-but-set-variable]
  double c1,c2,b,a,z1,z2,z3,t90,t108,t72,r;
                                     ^~~