谁会改，60分。

wzb123 @ 2017-08-01 15:35:26

#include<iostream>
#include<string>
using namespace std;
int main(){
    string s;
    int n;
    cin>>n;
    cin>>s;
    for(int i=0;i<=s.size();i++){
        s[i]=s[i]+n;
    }
    cout<<s;
    return 0;
}

by wzb123 @ 2017-08-01 15:36:03

各位帮帮忙

by Nj85 @ 2017-08-01 15:48:56

#include<iostream>
#include<cstring>
using namespace std;
int main()
{
    string s;
    int n,i,j;
    cin>>n;
    cin>>s;
    for(i=0;i<s.size();++i) //字符串从0到size-1,所以不能加'='; 
    {
        for(j=1;j<=n;++j)
        {
            ++s[i];
            if(s[i]>'z')    //考虑跃出的情况 
            s[i]='a';
        }
    }
    cout<<s;
    return 0;
}

by wzb123 @ 2017-08-02 08:14:54

感谢你，已经对了，谢谢！！！