蓝桥杯 FJ的字符串

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 int main() {
 4     string s = "A";
 5     int n;
 6     cin >> n;
 7     if (n == 1) {
 8         cout << s << endl;
 9         return 0;
10     }
11     for (int i = 1; i < n; i++) {
12         s = s + char(‘A‘ + i) + s;
13     }
14     cout << s << endl;
15     return 0; 
16 }