大神求助，为什么错了？

Juliet @ 2016-02-16 17:30:12

#include <iostream>
using namespace std;
int n;
int main()
{
    scanf("%d",n);
    char s[100],s1[100];
    gets(s);
    int k = strlen(s);
    for(int i = 0;i<k;i++)
    {
        if( ( s[i] + n ) > 'z' )
           s1[i] = (s[i]- 26 + n);
        else
           s1[i] = (s[i]+n);
    }
    for(int i = 0;i<k;i++)
      cout<<s1[i];
    return 0;
}

by Juliet @ 2016-02-16 17:33:06

改了后的，之前那个cin用多了。。还是错。

#include <iostream>
using namespace std;
int n;
int main()
{
    scanf("%d",&n);
    char s[100],s1[100];
    gets(s);
    int k = strlen(s);
    for(int i = 0;i<k;i++)
    {
        if( ( s[i] + n ) > 'z' )
           s1[i] = (s[i]- 26 + n);
        else
           s1[i] = (s[i]+n);
    }
    for(int i = 0;i<k;i++)
      cout<<s1[i];
    return 0;
}