两数相除--位运算

英语版

中文版

这道题思路跟一个up主一样 就是细节处理不是很好 ~~~~ x1 x2 x4 x8 而我没有导致超时

public int divide(int dividend, int divisor) {
  if (divisor == 0)
            return Integer.MAX_VALUE;
        if (dividend == Integer.MIN_VALUE) {
            if (divisor == -1)
                return Integer.MAX_VALUE;
            else if (divisor == 1)
                return Integer.MIN_VALUE;
        }
        long divi = dividend;
        long divs = divisor;
        int sign = 1;
        if (divi < 0) {
            sign = -sign;
            divi = -divi;
        }
        if (divs < 0) {
            sign = -sign;
            divs = -divs;
        }
        int res = 0;
        while (divi >= divs) {
            int shift = 0 ;
            while (divi >= divs<<shift) {
                shift++;
            }
            res += (1<<(shift-1));
            divi -= (divs<<(shift-1));
        }
        return res * sign;
    }

其他解题思路

https:// leetcode-cn.com/problems/divide-two-integers/

标签：运算,divi,int,相除,sign,Integer,divs,divisor
来源： https://blog.51cto.com/14429166/2417903