/in/foo.cc: In function 'int main()':
/in/foo.cc:14:17: error: 'c' was not declared in this scope
   14 |                 c=a+b;
      |                 ^
/in/foo.cc:20:15: error: '\U0000ff08m' was not declared in this scope
   20 |         int p=（m/(m-a-b)）;
      |               ^~~