题解 | #字符串加密#

// HJ36 字符串加密.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
#include<iostream>
#include<bits/stdc++.h>

using namespace std;

int main()
{
	string s, word;
	vector<bool>flag(26, false);
	string v;
	while (cin >> s >> word)
	{
		for (int i = 0; i < s.size(); i++)
		{
			s[i] = toupper(s[i]);
			if (flag[s[i]-'A']==false)
			{
				v.push_back(s[i]);
				flag[s[i] - 'A'] = 1;
			}
		}
		int len = v.size();
		for (char i = 'A'; i <='Z'; i++)
		{
			if (flag[i-'A'] == false)
			{
				v.push_back(i);
			}
		}
		string output;
		for (int j = 0; j < word.size(); j++)
		{
			if (islower(word[j]))
			{
				output += v[word[j] - 'a'] + 32;
			}
			else if (isupper(word[j]))
			{
				output += v[word[j] - 'A'];
			}
		}
		cout << output << endl;
	}
	return 0;
}