打印左箭头数字图案的C++程序

编写一个C++程序，使用for循环打印左箭头数字模式。

#include using namespace std;

int main() { int rows, i, j;


cout << "Enter Left Arrow Number Pattern Rows = ";
cin >> rows;

cout << "The Left Arrow Numbers Pattern\\n";

for (i = rows; i >= 1; i--)
{
	for (j = i; j >= 1; j--)
	{
		cout << j << " ";
	}
	cout << "\\n";
}

for (i = 2; i <= rows; i++)
{
	for (j = i; j >= 1; j--)
	{
		cout << j << " ";
	}
	cout << "\\n";
}

#include using namespace std;

int main() { int rows, i, j;


cout << "Enter Left Arrow Number Pattern Rows = ";
cin >> rows;

cout << "The Left Arrow Numbers Pattern\\n";
i = rows;

while (i >= 1)
{
	j = i;
	while (j >= 1)
	{
		cout << j << " ";
		j--;
	}
	cout << "\\n";
	i--;
}

i = 2;
while (i <= rows)
{
	j = i;
	while (j >= 1)
	{
		cout << j << " ";
		j--;
	}
	cout << "\\n";
	i++;
}

Enter Left Arrow Number Pattern Rows = 12
The Left Arrow Numbers Pattern
12 11 10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
7 6 5 4 3 2 1 
6 5 4 3 2 1 
5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1 
2 1 
3 2 1 
4 3 2 1 
5 4 3 2 1 
6 5 4 3 2 1 
7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
12 11 10 9 8 7 6 5 4 3 2 1

这个C++例子使用do while循环显示数字的左箭头模式。

#include using namespace std;

int main() { int rows, i, j;

cout << "Enter Left Arrow Number Pattern Rows = ";
cin >> rows;

cout << "The Left Arrow Numbers Pattern\\n";
i = rows;

do
{
	j = i;
	do
	{
		cout << j << " ";

	} while (--j >= 1);
	cout << "\\n";

} while (--i >= 1);

i = 2;
do
{
	j = i;
	do
	{
		cout << j << " ";

	} while (--j >= 1);
	cout << "\\n";

} while (++i <= rows);

Enter Left Arrow Number Pattern Rows = 16
The Left Arrow Numbers Pattern
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 
14 13 12 11 10 9 8 7 6 5 4 3 2 1 
13 12 11 10 9 8 7 6 5 4 3 2 1 
12 11 10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
7 6 5 4 3 2 1 
6 5 4 3 2 1 
5 4 3 2 1 
4 3 2 1 
3 2 1 
2 1 
1 
2 1 
3 2 1 
4 3 2 1 
5 4 3 2 1 
6 5 4 3 2 1 
7 6 5 4 3 2 1 
8 7 6 5 4 3 2 1 
9 8 7 6 5 4 3 2 1 
10 9 8 7 6 5 4 3 2 1 
11 10 9 8 7 6 5 4 3 2 1 
12 11 10 9 8 7 6 5 4 3 2 1 
13 12 11 10 9 8 7 6 5 4 3 2 1 
14 13 12 11 10 9 8 7 6 5 4 3 2 1 
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1