View Compilation Error

0_0_39181469_15054.cpp: In member function 'BigInteger BigInteger::operator+(const BigInteger&) const':
0_0_39181469_15054.cpp:100:33: error: no match for 'operator-' (operand types are 'const BigInteger' and 'BigInteger')
  100 |             return sign ? *this - tmp : num - tmp;
      |                           ~~~~~ ^ ~~~
      |                           |       |
      |                           |       BigInteger
      |                           const BigInteger
0_0_39181469_15054.cpp:100:45: error: no match for 'operator-' (operand types are 'const BigInteger' and 'BigInteger')
  100 |             return sign ? *this - tmp : num - tmp;
      |                                         ~~~ ^ ~~~
      |                                         |     |
      |                                         |     BigInteger
      |                                         const BigInteger