/in/foo.cc: In function 'int main()':
/in/foo.cc:7:7: warning: unused variable 'n' [-Wunused-variable]
 float n;
       ^
/in/foo.cc:8:8: warning: unused variable 'v' [-Wunused-variable]
 double v;
        ^
/in/foo.cc:11:9: error: expected '}' at end of input
 return 0;
         ^