题解 | #上下金字塔#c++

#include using namespace std;

int main() { int n; while (cin >> n) { int sum = -1; int i = 1; int k = 0; while(k<n) { sum = sum + 2; k++; } i = 1; k = 1; while (i <= n) {

        for (int l = 0; l < (sum - k) / 2; l++)
        {
            cout << " ";
        }
        for (int j = 0; j < k; j++)
        {
            cout << "*";
        }
        cout << endl;
        k = k + 2;
        i++;
    }

    k = k - 4;
    while (k > 0)
    {

        for (int l = 0; l < (sum - k) / 2; l++)
        {
            cout << " ";
        }
        for (int j = sum - k; j < sum; j++)
        {
            cout << "*";
        }
        cout << endl;
        k = k - 2;

    }
}

}