算法与数据结构之二进制数字相加

67. Add Binary

贴上代码，如何处理好进位是关键

class Solution {
public:
    string addBinary(string a, string b) {       
        string s = "";
        
        int c = 0, i = a.size() - 1, j = b.size() - 1;
        while(i >= 0 || j >= 0 || c == 1)
        {
            c += i >= 0 ? a[i --] -'0' : 0;
            c += j >= 0 ? b[j --]-'0' : 0;
            s = char(c % 2 + '0') + s;
            c /= 2;
        }
        
        return s;

    }
};

char to int 用 -'0'
int to char 用+'0'
to_string()接受int参数

char*itoa(int value,char*string,int radix);

int atoi(const char *nptr);