foo.cc: In function 'int main()':
foo.cc:9:19: error: expected primary-expression before '/' token
    9 |                 b=/10%10;
      |                   ^
foo.cc:16:45: error: expected ';' before '}' token
   16 |                                 printf("\n")
      |                                             ^
      |                                             ;
   17 |                 }
      |                 ~