C + + does not implement integer addition with any arithmetic operator

This is a question of Careerup, see the future to do a bit, the main difficulty is the addition of the carry. Directly on the code:

1 intAddintAintb)2 {3     Const intBitsize =sizeof(int) *8;4     intDigit[bitsize] = {0};5     intFirst = A, second =b;6     intcarry =0;7     intresult =0;8      for(inti =0; i < bitsize; i++)9     {Ten          OneDigit[i] = (First &1) ^ (Second &1) ^carry; A  -         if((First &1) ==1&& (Second &1) ==1) || (First &1) ==1&& carry = =1) || (Carry = =1&& (Second &1) ==1)) -carry =1; the         Else -carry =0; -  -First = First >>1; +Second = Second >>1; -  +result = Result | (Digit[i] <<i); A     } at     returnresult; -      -}

Later on the web found a more convenient method:

1 intAdd_no_arithm (intAintb)2 {3     if(b = =0)returnA;4     intsum = a ^ b;//add without carrying5     intCarry = (A & B) <<1;//carry, but don ' t add6     returnAdd_no_arithm (sum, carry);//recurse7}

It's ingenious, carry is the place to carry.

C + + does not implement integer addition with any arithmetic operator