不用那么复杂 #include <bits/stdc++.h> using namespace std; string ch; int ans; int main() { cin>>ch; for(int i=0;i<ch.size();i++){ ans=int(ch[i])+4; cout<<char(ans); } return 0; }

#include<bits/stdc++.h> using namespace std; int main() { //freopen("xinxi.in","r",stdin); //freopen("xinxi.out","w",stdout); string a; getline(cin,a); for(int i=0;i<a.size();i++){ if(a[i]>='A'&&a[i]<='Z'||a[i]>='a'&&a[i]<='z'){ if(a[i]>='A'&&a[i]<='V'||a[i]>='a'&&a[i]<='v') a[i]=a[i]+4; else a[i]=a[i]+('W'-'A'); } }cout<<a; return 0; }