题解 | #字符串加密#

#include "stdio.h"
#include "string.h"

int main()
{
    char key[101];
    char buf[101];
    while(scanf("%s",key)!=EOF)
    {
        memset(buf,0,100);
        scanf("%s",buf);
        int len_key = strlen(key);
        int len_buf = strlen(buf);
        char letter[26],count=0;
        for(int i=0;i<len_key;i++) // 排除密码key字符串重复项
        {
            char flag=0;
            char temp;
            for(int j=0;j<count;j++)
            {
                if(key[i]>='a' && key[i]<='z')
                    temp = key[i]-'a';
                else if (key[i]>='A' && key[i]<='Z')
                    temp = key[i]-'A';
                if(temp==letter[j])
                {
                    flag=1;
                    break;
                }
            }
            if(flag==0)
            {
                if(key[i]>='a' && key[i]<='z')
                    letter[count++] = key[i]-'a';
                else if(key[i]>='A' && key[i]<='Z')
                    letter[count++] = key[i]-'A';
            }
        }
        for(int i=0;i<26;i++) // 创建密码表
        {
            char flag=0;
            for(int j=0;j<count;j++)
            {
                if(letter[j]==i)
                {
                    flag=1;
                    break;
                }
            }
            if(flag==0)
            {
                letter[count++] = i;
            }
        }
        for(int i=0;i<len_buf;i++) // 加密字符串
        {
            if(buf[i]>='a' && buf[i]<='z')
            {
                buf[i]= letter[buf[i]-'a']+'a';
            }
            else if(buf[i]>='A' && buf[i]<='Z')
            {
                buf[i]= letter[buf[i]-'A']+'A';
            }
            else
            {
                continue;
            }
        }
        printf("%s\n",buf);
    }
    return 0;
}

哈皮加密思路