7.Reverse Integer (INT; Overflow)

Reverse digits of an integer.

Example1: x = 123, return 321
Example2: x = -123, return-321

Idea: be aware of overflow. Use the following procedure to overflow.

class Solution {public:    int reverse (int  x) {        int 0 ;          while (x) {            ten + xpercent;             Ten ;        }         return ret;    }};

An improved approach:

classSolution { Public:    intReverseintx) {if(x = = int_min)return 0; intRET =0; intDigit; BOOLpos = x>=0?true:false; X= ABS (x);//now the negative modulo compiler is not uniform, so it becomes a positive action         while(x) {digit= x percentTen; if(Ret > (int_max-digit)/Ten)//10*ret+digit > Int_max                return 0; RET= RET *Ten+Digit; X/=Ten; }        if(POS)returnret; Else return(-ret); }};

7.Reverse Integer (INT; Overflow)