求助！为啥全WA掉

dp_hater @ 2022-06-18 14:33:15

#include<bits/stdc++.h>
using namespace std;
char a[10000];
int main(){
    int n;
    cin>>n;
    cin.ignore();
    cin.getline(a,51);
    for(int i=0;i<strlen(a);i++){
        cout<<(char)((int)(a[i]-'a'+n)%26+'a');
    }
    cout<<endl;
    return 0;
}

by lixuhui20120805 @ 2022-08-09 14:39:37

#include<bits/stdc++.h>
using namespace std;
string s;
int n;
int main(int argc, char** argv) {
    cin >> n >> s;
    for (int i = 0; i < s.size(); i++) {
        if (s[i] >= 'a' && s[i] <= 'z') {//26个字母循环一次
            int rest =n%26;
            int cur = (int) s[i] + rest;

            if (cur > 'z') {//偏移的结果超过了字母z，需要从a从新开始偏移
                int gap = cur - 'z';//计算超过了z多少个数量
                s[i]=gap+'a'-1;//从'a'开始偏移
            } else {
                s[i] += rest;
            }
        }
    }
    cout << s;
    return 0;
}

AC