Leetcode/AddBinary.cpp.save at master · Jessicahust/Leetcode · GitHub

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#include<iostream>
#include<string>
#include<vector>
using namespace std;

class Solution
{
public:
    string addBinary(string a, string b)
    {
        int size1=a.size()-1;
        int size2=b.size()-1;
        int size=max(size1,size2);
        string digits(size+1,'0');
        cout<<digits<<endl;
        while(size1>=0&&size2>=0)
        {
            if((a[size1]=='1')&&(b[size2]=='1'))
            {
                digits[size-1]='1';
                size1--;
                size2--;
                size--;
            }
            else if(((a[size1]=='1')||(b[size2]=='1'))&&(digits[size]=='0'))
            {
                cout<<digits<<endl;
                digits[size]='1';
                size1--;
                size2--;
                size--;
            }
            else if(((a[size1]=='1')||(b[size2]=='1'))&&(digits[size]=='1'))
            {
                cout<<digits<<endl;
                digits[size]='0';
                digits[size-1]='1';
                size1--;
                size2--;
                size--;
            }
        }
        cout<<digits<<endl;
        if(size1>=0)
        {
            cout<<"size1  "<<digits<<endl;
            while(size1>=0&&size>=0)
            {
                if((digits[size]=='1')&&(a[size1]=='1'))
                {
                    digits[size]='0';
                    digits[size-1]='1';
                    size1--;
                    size--;
                }
                else if((digits[size]=='1')&&(a[size1]=='0'))
                {
                    size1--;
                    size--;
                }
                else
                {
                    digits[size]=a[size1];
                    size--;
                    size1--;
                }
            }
        }
        if(size2>=0)
        {
            while(size2>=0&&size>=0)
            {
                if((digits[size]=='1')&&(b[size2]=='1'))
                {
                    digits[size]='0';
                    digits[size-1]='1';
                    size2--;
                    size--;
                }
                else if((digits[size]=='1')&&(b[size2]=='0'))
                {
                    size2--;
                    size--;
                }
                else
                {
                    digits[size]=a[size2];
                    size--;
                    size2--;
                }
            }
        }
        size++;
        size1++
        if(digits[])
            digits.insert(digits.begin(),'1');
        return digits;
    }
};

int main()
{
    string b="111111";
    string a="1111";
    Solution s;
    cout<<s.addBinary(a,b)<<endl;
}