使用C++中的位运算，将两个无符号数相加

Input: a = 21 (10101) , b = 27 (11011)
Output: 48 (110000)

#include <bits/stdc++.h>
#define M 32
using namespace std;
int binAdd (bitset < M > atemp, bitset < M > btemp){
   bitset < M > ctemp;
   for (int i = 0; i < M; i++)
      ctemp[i] = 0;
   int carry = 0;
   for (int i = 0; i < M; i++) {
      if (atemp[i] + btemp[i] == 0){
         if (carry == 0)
            ctemp[i] = 0;
         Else {
            ctemp[i] = 1;
            carry = 0;
         }
      }
      else if (atemp[i] + btemp[i] == 1){
         if (carry == 0)
            ctemp[i] = 1;
         else{
            ctemp[i] = 0;
         }
      }
      else{
         if (carry == 0){
            ctemp[i] = 0;
            carry = 1;
         }
         else{
            ctemp[i] = 1;
         }
      }
   }
   return ctemp.to_ulong ();
}
int main () {
   int a = 678, b = 436;
   cout << "The sum of " << a << " and " << b << " is ";
   bitset < M > num1 (a);
   bitset < M > num2 (b);
   cout << binAdd (num1, num2) << endl;
}

The sum of 678 and 436 is 1114