运行 ID: 55981

Main.cc: In function ‘int main()’:
Main.cc:7:2: error: expected ‘;’ before ‘return’
  return 0;
  ^~~~~~
Main.cc:5:9: warning: unused variable ‘a’ [-Wunused-variable]
     int a,b;
         ^
Main.cc:5:11: warning: unused variable ‘b’ [-Wunused-variable]
     int a,b;
           ^