#include <bits/stdc++.h> using namespace std; int main(){ char ch; cin >> ch; for (int i = 1; i <= 3; i++) { for (int j = 1; j <= 3 - i; j++) cout << " "; for (int j = 1; j <= 2 * i - 1; j++) cout << ch;
cout << endl; } for (int i = 2; i >= 1; i--) { for (int j = 1; j <= 3 - i; j++) cout << " "; for (int j = 1; j <= 2 * i - 1; j++) cout << ch; cout << endl; }

return 0;

}

#include <bits/stdc++.h>
using namespace std;
int main(){
    char ch;
    cin >> ch;
    for (int i = 1; i <= 3; i++) {
    for (int j = 1; j <= 3 - i; j++) cout << " ";
    for (int j = 1; j <= 2 * i - 1; j++) cout << ch;   
    cout << endl;
    }
    for (int i = 2; i >= 1; i--) {
    for (int j = 1; j <= 3 - i; j++) cout << " ";
    for (int j = 1; j <= 2 * i - 1; j++) cout << ch;
    cout << endl;
    }
    

    return 0;
}



```cpp

 char ch;
    cin >> ch;

    // 上半部分（含中间行）
    for (int i = 1; i <= 3; i++) {
        for (int j = 1; j <= 3 - i; j++) cout << " ";      // 打印空格
        for (int j = 1; j <= 2 * i - 1; j++) cout << ch;   // 打印字符
        cout << endl;
    }

    // 下半部分
    for (int i = 2; i >= 1; i--) {
        for (int j = 1; j <= 3 - i; j++) cout << " ";
        for (int j = 1; j <= 2 * i - 1; j++) cout << ch;
        cout << endl;
    }