Given two binary strings, return their sum (also a binary string).
For example, a = "11" b = "1" Return "100".
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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;
}
};
有点难看懂
