中興筆試題目：

#include<iostream>
using namespace std;
class Triangle {
public:
	explicit Triangle(int n) :
		rows(n), sum(0), count(0), temp(0) { maxNum = rows*(rows + 1); }
	void TriangleOutput();
private:
	int rows;  //行數
	int maxNum;	//表示三角中最大的數字
	int sum;  //自由變數
	int count;
	int temp;
};
void Triangle::TriangleOutput()
{
	for (int r = 1;r <= rows;r++)//控制行
	{
		for (int a = 0;a < r - 1;a++)//先輸出每行的”--“
			cout << "--";
		count = (4 * (rows - r) + 3);//用來快取第r行的數字和“*”的總個數
		temp = (count + 1 )/ 2;
		for (int c = 1,left=sum+1, right = (maxNum - sum - rows + r)//每行右半三角的第一個值
			;c <=count; c++)
		{
				if (c <= temp)	//左半三角
				{
					if (c % 2 == 1)
					{
						cout << left;
						left++;
					}
					if (c % 2 == 0)
						cout << "*";
				}
				if (c > temp) //右半三角
				{
					if (c % 2 == 1)
					{
						cout << right;
						right++;
					}
					if (c % 2 == 0)
						cout << "*";
				}
		}
		sum = sum + rows - r + 1;//得到左半三角的左右邊的值
		cout << endl;
	}
	cout << endl;
}
int main()
{
	int n(0);
	cout << "請輸入行數n:";
	cin >> n;
	Triangle Tr(n);
	Tr.TriangleOutput();
	return 0;
}