[数据结构与算法]HJ36 字符串加密

HJ36 字符串加密

理解题意然后就很简单了

题目

代码

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

void jiami(string key, string str){
	vector<char> alpha(26);
	string res = "";
	int j = 0;
	for(int i = 0; i < key.size(); i++){
		if(std::find(alpha.begin(), alpha.end(), key[i]) == alpha.end()){
			alpha[j++] = key[i];
		}
	}
	for(int i = 0; i < 26; i++){
		if(std::find(alpha.begin(), alpha.end(), 'a' + i) == alpha.end()){
			alpha[j++] = 'a' + i;
		}
	}
	for(int i = 0; i < str.size(); i++){
		if('A' <= str[i] && str[i] <= 'Z' || 'a' <= str[i] && str[i] <= 'z'){
			if('A' <= str[i] && str[i] <= 'Z'){
				res += alpha[str[i] - 'A'];
			}else if('a' <= str[i] && str[i] <= 'z'){
				res += alpha[str[i] - 'a'];
			}
		}else{
			res += str[i];
		}
	}
	cout<<res;
}

int main(){
	string key, str;
	cin>>key>>str;
	jiami(key, str);
	return 0;
}