/in/foo.cc: In function 'int main()':
/in/foo.cc:19:21: error: unable to find numeric literal operator 'operator""\U0000ff1b'
   19 |     int totalDays2 =0；
      |                     ^~~
/in/foo.cc:19:21: note: use '-fext-numeric-literals' to enable more built-in suffixes
/in/foo.cc:20:19: error: 'i' was not declared in this scope
   20 |     for (int i=0; i<month2-1;++i)
      |                   ^