/in/foo.cc: In function 'int main()':
/in/foo.cc:8:29: warning: format '%f' expects argument of type 'float*', but argument 2 has type 'double*' [-Wformat=]
  scanf("%1f,%1f,%c",&a,&b,&c);
                             ^
/in/foo.cc:8:29: warning: format '%f' expects argument of type 'float*', but argument 3 has type 'double*' [-Wformat=]
/in/foo.cc:6:13: warning: variable 'result' set but not used [-Wunused-but-set-variable]
  double a,b,result;
             ^~~~~~