注意他给的示例输出是错的！ 被替换为******的后面也是要加下划线的

#include <iostream>
#include <string>
#include <vector>
using namespace std;
string stringEncryption(int index, string input)
{
	string output = "";
	vector<string> temp;
	for (int left = 0, right = 0; left < input.length(), right < input.length(); left++)
	{
		//相当于做一个split，把string用下划线分开
		if (input[left] == '_')
		{
			if (!(left - right == 0))
			{
				string in = input.substr(right, left - right);
				temp.push_back(in);
			}
			right = left + 1;
		}
		if (input[left] == '\"')
		{
			//如果双引号内的内容为空，就把双引号连同他前面的命令一起加进去
			if (input[left + 1] == '"')
			{
				left += 2;
				string in = input.substr(right, left - right);
				temp.push_back(in);
				right = left + 1;
			}
			else
			{
				right = left + 1;
				left++;
				//找到下一个双引号
				while (input[left] != '\"'&&left < input.length())
					left++;
				//把双引号内的内容写入
				string in = input.substr(right, left - right);
				temp.push_back(in);
				right = left + 1;
			}
		}
	}
	if (index >= temp.size())
		return "ERROR";
	for (int i = 0; i < temp.size(); i++)
	{

		if (i != index)
			output.append(temp[i]);
		else
			output.append("******");
		if (i != temp.size() - 1)
			output.append("_");
	}
	return output;
}
int main(int argc, char *argv[])
{
	int index = 0;
	cin >> index;
	string input;
	cin >> input;

	cout << stringEncryption(index, input);
}