題目連結

程式碼

#include<iostream>
#include<math.h>
using namespace std;

int main() {
    int n;
    char c;
    cin >> n >> c;
    int row = (n+1) / 2;
    for(int i=0; i<row; i++) {
        for(int j=0; j<n; j++) {
            if(i == 0 || i == row-1 || j== 0 || j == n-1)
                printf
 
("%c", c);
            else
                printf(" ");
        }
        printf("\n");
    }
}