Reverse Integer【易】

Reverse Integer

翻转一个整数

难度：易

例子：

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

 

没甚麽好说的，直接上代码；

class Solution {
public:
    int reverse(int x) {
        int i, j, k = 0;
        int iResult = 0;
        int flag = -1;
        int iTemp = x;
        
        while(1)
        {
            if(iTemp / 10 == 0)
            {
                break;   
            }
            iTemp /= 10;
            k ++;
        }
        
        k ++;
        //std::cout<<k<<std::endl;
        
        for(i = 1; i <= k; i ++)
        {
            if(x % 10 == 0 && flag == -1)
            {
                x /= 10;
                continue;   
            }
            if(x % 10 != 0)
                flag = i;
                
            if((iResult > 214748364 || (iResult == 214748364 && x % 10 >= 8)) || (iResult < -214748364 || (iResult == -214748364 && x % 10 >= 8)))
            {
                iResult = 0;
                break;	
            }
            iResult = iResult * 10 + x % 10;
            
            x /= 10;
            
            //std::cout<<"i= "<<i<<" "<<iResult<<std::endl;
        }
        
        return iResult;
        
    }
};