c语言 翻译密码

代码如下：

#include
#include
int main()
{
    int i=0;
    char s1[100],s2[100];
    scanf("%s",s1);
    while(s1[i]!='\0')
    {
        s2[i]=s1[i];
        if(s1[i]>='A'&&s1[i]<='Z')
            s2[i]=155-s1[i];
        else
            if(s1[i]>='a'&&s1[i]<='z')
            s2[i]=219-s1[i];
            i++;
    
    }
    printf("%s,%s",s1,s2);
}