C++程序打印左箭头字母图案

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编写一个C++程序，使用for循环打印左箭头的字母图案。

#include using namespace std;

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


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

cout << "The Left Arrow Alphabets Pattern\\n";
alphabet = 65;

for (i = rows - 1; i >= 0; i--)
{
	for (j = i; j >= 0; j--)
	{
		cout << char(alphabet + j) << " ";
	}
	cout << "\\n";
}

for (i = 0; i < rows; i++)
{
	for (j = i; j >= 0; j--)
	{
		cout << char(alphabet + j) << " ";
	}
	cout << "\\n";
}

image.png

#include using namespace std;

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


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

cout << "The Left Arrow Alphabets Pattern\\n";
alphabet = 65;
i = rows - 1;

while (i >= 0)
{
	j = i;
	while (j >= 0)
	{
		cout << char(alphabet + j) << " ";
		j--;
	}
	cout << "\\n";
	i--;
}

i = 0;
while (i < rows)
{
	j = i;
	while (j >= 0)
	{
		cout << char(alphabet + j) << " ";
		j--;
	}
	cout << "\\n";
	i++;
}

Enter Left Arrow Pattern of Alphabets Rows = 13
The Left Arrow Alphabets Pattern
M L K J I H G F E D C B A 
L K J I H G F E D C B A 
K J I H G F E D C B A 
J I H G F E D C B A 
I H G F E D C B A 
H G F E D C B A 
G F E D C B A 
F E D C B A 
E D C B A 
D C B A 
C B A 
B A 
A 
A 
B A 
C B A 
D C B A 
E D C B A 
F E D C B A 
G F E D C B A 
H G F E D C B A 
I H G F E D C B A 
J I H G F E D C B A 
K J I H G F E D C B A 
L K J I H G F E D C B A 
M L K J I H G F E D C B A

这个C++例子使用do while循环显示字母的左箭头模式。

#include using namespace std;

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


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

cout << "The Left Arrow Alphabets Pattern\\n";
alphabet = 65;
i = rows - 1;

do
{
	j = i;
	do
	{
		cout << char(alphabet + j) << " ";

	} while (--j >= 0);
	cout << "\\n";

} while (--i >= 0);

i = 0;
do
{
	j = i;
	do
	{
		cout << char(alphabet + j) << " ";

	} while (--j >= 0);
	cout << "\\n";

} while (++i < rows);

Enter Left Arrow Pattern of Alphabets Rows = 17
The Left Arrow Alphabets Pattern
Q P O N M L K J I H G F E D C B A 
P O N M L K J I H G F E D C B A 
O N M L K J I H G F E D C B A 
N M L K J I H G F E D C B A 
M L K J I H G F E D C B A 
L K J I H G F E D C B A 
K J I H G F E D C B A 
J I H G F E D C B A 
I H G F E D C B A 
H G F E D C B A 
G F E D C B A 
F E D C B A 
E D C B A 
D C B A 
C B A 
B A 
A 
A 
B A 
C B A 
D C B A 
E D C B A 
F E D C B A 
G F E D C B A 
H G F E D C B A 
I H G F E D C B A 
J I H G F E D C B A 
K J I H G F E D C B A 
L K J I H G F E D C B A 
M L K J I H G F E D C B A 
N M L K J I H G F E D C B A 
O N M L K J I H G F E D C B A 
P O N M L K J I H G F E D C B A 
Q P O N M L K J I H G F E D C B A
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