Easy-19

leetcode

Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.

Example:
Given a = 1 and b = 2, return 3.

AC:

int getSum(int a, int b) {
    int result;
    while(b!=0)
    {
        result=a^b;
        b=(a&b)<<1;
        a=result;
    }
    return a;
}

tips: 简单易懂的解法，很受益。