题解 | #最长公共前缀#

class Solution {
public:
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 
     * @param strs string字符串vector 
     * @return string字符串
     */
    string longestCommonPrefix(vector<string>& strs) {
        // write code here
        string res = "";
        if(strs.size() == 0){
            return res;
        }
        bool isEqual = true;
        string temp = strs[0];
        int index = 0;
        int temp_len = temp.length();
        for( int i = i; i < strs.size(); i++ ){
            temp = strs[i];
            if(temp_len > temp.length()){
                temp_len = temp.length();
                index = i;
            }
        }
        temp = strs[index];
        string compare_str = "";
        for(int len = 1; len <= temp_len ; len++){
            compare_str = temp.substr(0,len);
            for(int i = 0; i < strs.size(); i++){
                if(compare_str.compare(strs[i].substr(0,len)) != 0){
                    isEqual = false;
                    break;
                }
            }
            if(!isEqual){
                break;
            }else{
                res = compare_str;
            }
        }
        return res;
    }

};