Message Decowding

最新推荐文章于 2022-12-06 03:22:22 发布

JimmyLegend

最新推荐文章于 2022-12-06 03:22:22 发布

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分类专栏：练习

本文链接：https://blog.youkuaiyun.com/guoqingshuang/article/details/50193371

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本文介绍了一个简单的替换加密方法，通过使用特定的密钥来解码秘密消息。文章提供了完整的解密算法实现，包括输入密钥和待解密的消息，然后输出解密后的明文。

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Message Decowding

Time Limit: 1000ms Memory limit: 65536K 有疑问？点这里^_^

题目描述

The cows are thrilled because they've just learned about encrypting messages. They think they will be able to use secret messages to plot meetings with cows on other farms.

Cows are not known for their intelligence. Their encryption method is nothing like DES or BlowFish or any of those really good secret coding methods. No, they are using a simple substitution cipher.
The cows have a decryption key and a secret message. Help them decode it. The key looks like this:

yrwhsoujgcxqbativndfezmlpk

Which means that an 'a' in the secret message really means 'y'; a 'b' in the secret message really means 'r'; a 'c' decrypts to 'w'; and so on. Blanks are not encrypted; they are simply kept in place.

Input text is in upper or lower case, both decrypt using the same decryption key, keeping the appropriate case, of course

输入

* Line 1: 26 lower case characters representing the decryption key

* Line 2: As many as 80 characters that are the message to be decoded

输出

* Line 1: A single line that is the decoded message. It should have the same length as the second line of input.

示例输入

eydbkmiqugjxlvtzpnwohracsf
Kifq oua zarxa suar bti yaagrj fa xtfgrj

示例输出

Jump the fence when you seeing me coming

来源

USACO 2003 March Orange

#include<stdio.h>  
#include<string.h>  
int main()  
{  
    char tmp,keys[26];  
    while(scanf("%s",keys)!=EOF)  
        {  
        getchar();  
        while((tmp=getchar())!='\n')  
        {  
            if(tmp>='a' && tmp<='z')  
                putchar(keys[tmp-'a']);  
            else if(tmp>='A' && tmp<='Z')  
                putchar(keys[tmp-'A']-32);  
            else  
                putchar(tmp);  
        }  
        putchar(tmp);  
    }  
    return 0;  
}