算法提高 9-2 文本加密

#include <iostream>
#include <cstdio>
#include <cmath>
#include <vector>
#include <queue>
#include <cstring>
#include <algorithm>
#include <cstdlib>
#define for(i,x,n) for(int i=x;i<n;i++)
#define ll long long int
#define INF 0x3f3f3f3f
#define MOD 1000000007
#define MAX_N 50005

using namespace std;


int main()
{
    //freopen("input.txt", "r", stdin);
    //freopen("data.out", "w", stdout);
    char a[100];
    scanf("%s",a);
    int len=strlen(a);
    for(i,0,len){
        if(a[i]==‘Z‘){
            a[i]=‘a‘;
        }else if(a[i]==‘z‘){
            a[i]=‘A‘;
        }else if(a[i]>=65 &&a[i]<=90 || a[i]>=97&&a[i]<=122){
            a[i]+=1;
        }else {
            continue;
        }
    }
    printf("%s",a);
    //fclose(stdin);
    //fclose(stdout);
    return 0;
}
//