C语言凯撒密码怎么写？

Question

问问要怎么写？毫无思路qwq 写了很久也不知道怎么办，感谢各位的帮忙啦！

Answer 1

https://ask.csdn.net/questions/7958783/54227935?spm=1001.2014.3001.5504
刚回答过
稍微修改下

#include <stdlib.h>
 
int main()
{
    char s[100];
    int isenc;
    int offset;
    scanf("%d", &isenc);
    scanf("%s", s);
    scanf("%d", &offset);
    if (isenc)
    {
        for (char *i = s; *i; i++)
            if ('a' <= *i && 'z'>=*i)
                if (*i + offset > 'z')
                    printf("%c", *i - 26 + offset);
                else
                    printf("%c", *i + offset);
            else
                printf("%c", *i);  
    }
    else
    {
        for (char *i = s; *i; i++)
            if ('a' <= *i && 'z'>=*i)
                if (*i - offset < 'a')
                    printf("%c", *i + 26 - offset);
                else
                    printf("%c", *i - offset);
            else
                printf("%c", *i);
    }
    return(0);
}