foo.cc: In function 'int main()':
foo.cc:5:24: error: invalid operands of types 'double' and 'double' to binary 'operator%'
     cout << 792*3.2/2.8%2.8 << endl;
             ~~~~~~~~~~~^~~~

自豪的采用HydroJudge(https://github.com/hydro-dev/Hydro)进行评测。