优化后的标题：珍贵宝石的数量分析与评估

class Solution {
public:int numJewelsInStones(string J, string S) {//统计宝石个数int count &＃61; 0;//获得字符串长度int j_length &＃61; J.length();int s_length &＃61; S.length();int s &＃61; 0;while (s};