Leetcode题目：Longest Common Prefix

题目：

Write a function to find the longest common prefix string amongst an array of strings.

题目解答：

求一组字符串的最长公共前缀。使用迭代器数组实现。思路异常的简单。

代码如下：

class Solution {
public:
    string longestCommonPrefix(vector<string>& strs) {
        string res;
        int size = strs.size();
        if(size <= 0)
        {
            return res;
        }
        string::iterator sptr[size];
        for(int i = 0;i < size;i++)
        {
            sptr[i] = strs[i].begin();
        }
        bool flag = true;
        while(*(sptr[0]) != '')
        {
            for(int i = 1; i < size;i++)
            {
                if(*(sptr[i]) == *(sptr[i - 1]))
                {
                    continue;
                }
                else
                {
                    flag = false;
                    break;
                }
            }
            if(flag)
            {
                res += *(sptr[0]);
                for(int i = 0;i < size;i++)
                {
                    (sptr[i])++;
                }
            }
            else
            {
                break;
            }
        }
        return res;
    }
};