题解 | #字符串加解密#

#include <stdio.h>
#include<string.h>
int main() {
    char s1[1000];
    char s2[1000];
    int len1,len2;
    int i=0;
    int j=0;
    gets(s1);
    gets(s2);
    len1=strlen(s1);
    len2=strlen(s2);

    while(i<len1)
    {
        if(s1[i]>='a'&&s1[i]<'z')
        {
            s1[i]=s1[i]-31;
        
        }
        else if(s1[i]=='z')
        {
            s1[i]='A';
        }
        else if(s1[i]>='A'&&s1[i]<'Z')
        {
            s1[i]=s1[i]+33;
    
        }
        else if(s1[i]=='Z')
        {
            s1[i]='a';
        }
        else if(s1[i]>='0'&&s1[i]<'9')
        {
            s1[i]=s1[i]+1;
        }
        else if(s1[i]=='9'){
            s1[i]='0';
        }
        i++;

    }
    while(j<len2)
    {
        if(s2[j]>'a'&&s2[j]<='z')
        {
            s2[j]=s2[j]-33;
        
        }
        else if(s2[j]=='a')
        {
            s2[j]='Z';
        }
        else if(s2[j]>'A'&&s2[j]<='Z')
        {
            s2[j]=s2[j]+31;
    
        }
        else if(s2[j]=='A')
        {
            s2[j]='z';
        }
        else if(s2[j]>'0'&&s2[j]<='9')
        {
            s2[j]=s2[j]-1;
        }
        else if(s2[j]=='0'){
            s2[j]='9';
        }
        j++;
    }
    printf("%s",s1);
    printf("\n");
    printf("%s",s2);
    return 0;
}