PTA 乙级 1036 跟奥巴马一起编程 (15分) C/C++

 水，补题

C++

 1 #include<iostream>
 2 #include<cmath>
 3 using namespace std;
 4 
 5 int main() {
 6     int n = 0;
 7     char s;
 8     cin >> n >> s;
 9     int b = round((double)n / 2);
10     for (int i = 1; i <= b; i++) {
11         for (int j = 1; j <= n; j++) {
12             if (i == 1 || i == b)cout << s;
13             else if (j == 1 || j == n)cout << s;
14             else cout << " ";
15         }
16         cout << endl;
17     }
18     return 0;
19 }