题解 | #另类加法#
另类加法
http://www.nowcoder.com/practice/e7e0d226f1e84ba7ab8b28efc6e1aebc
class UnusualAdd {
public:
int addAB(int a, int b) {
// if(a == 0) return b;
// if(b == 0) return a;
// int on = a ^ b;
// int add = ((a&b)<<1);
// return addAB(on,add);
while (b) {
int c = a ^ b;
b = (a&b) << 1;
a = c;
}
return a;
}
};
