打印图案“D”的程序
在本文中,我们将学习如何使用星号和空格打印图案 D。给定一个数字 n,我们将编写一个程序在 n 行或行上打印模式 D。
例子 :
Input : n = 9
Output :
******
* *
* *
* *
* *
* *
* *
* *
******
Input : n = 12
Output :
*********
* *
* *
* *
* *
* *
* *
* *
* *
* *
* *
*********
如果我们尝试用(行,列)矩阵分析这张图片,绿色圆圈代表图案 D 中星星的位置,我们将学习这些步骤。在这里,我们按列执行操作。所以,对于第一行星星,我们设置了第一个 if 条件,其中列位置为 1 的位置获得星星。然后所有大于 1 且小于 (n-2) 的列以及等于 1 和 n-1 的行位置都获得星号。最后,所有值为 n-2 且行不等于 0 或 6 的列都获得星号,从而形成模式“D”。其他步骤是不言自明的,可以从图中的行和列的位置来理解。
注意:为“n”选择最小值 4 以获得“D”模式的可见演示。
C++
// C++ program to print the pattern "D"
#include
using namespace std;
// Function to generate the pattern D
void D_Pattern(int n){
// loop for rows
for (int i = 0; i < n; i++){
// loop for columns
for (int j = 0; j <= n; j++){
// Logic to generate stars for *
if (j == 1 || ((i == 0 || i == n-1) &&
(j > 1 && j < n-2)) || (j == n-2 &&
i != 0 && i != n-1))
cout<< "*";
// For the spaces
else
cout<< " ";
}
// For changing line
cout<< endl;
}
}
// Driver Code
int main()
{
int n = 9;
// Function calling
D_Pattern(n);
return 0;
}
// This article is contributed by mits
Java
// Java program to print the pattern "D"
import java.util.*;
class GFG {
// Function to generate the pattern D
static void D_Pattern(int n){
// loop for rows
for (int i = 0; i < n; i++){
// loop for columns
for (int j = 0; j <= n; j++){
// Logic to generate stars
// for *
if (j == 1 || ((i == 0 ||
i == n-1) &&
(j > 1 && j < n-2)) ||
(j == n-2 && i != 0 &&
i != n-1))
System.out.print("*");
// For the spaces
else
System.out.print(" ");
}
// For changing line
System.out.println();
}
}
// Driver Code
public static void main(String[] args)
{
int n = 9;
// Function calling
D_Pattern(n);
}
}
// This code is contributed by ChitraNayal.
Python3
# Python program to print the pattern "D"
# Function to generate the pattern D
def D_Pattern(string, n):
# loop for rows
for i in range(0, n):
# loop for columns
for j in range(0, n):
# Logic to generate stars for *
if (j == 1 or ((i == 0 or i == n-1) and
(j > 1 and j < n-2)) or (j == n-2 and
i != 0 and i != n-1)):
string = string + "*"
# For the spaces
else:
string = string + " "
# For changing line
string = string + "\n"
return(string);
# Driver Code
string = "";
n = 9
print(D_Pattern(string, n));
C#
// C# program to print
// the pattern "D"
using System;
class GFG
{
// Function to generate
// the pattern D
static void D_Pattern(int n)
{
// loop for rows
for (int i = 0; i < n; i++)
{
// loop for columns
for (int j = 0; j <= n; j++)
{
// Logic to generate
// stars for *
if (j == 1 || ((i == 0 ||
i == n - 1) &&
(j > 1 && j < n - 2)) ||
(j == n - 2 && i != 0 &&
i != n - 1))
Console.Write("*");
// For the spaces
else
Console.Write(" ");
}
// For changing line
Console.WriteLine();
}
}
// Driver Code
static public void Main ()
{
int n = 9;
// Function calling
D_Pattern(n);
}
}
// This code is contributed by ajit
PHP
1 and $j < $n-2)) or ($j == $n-2 and
$i != 0 and $i != $n-1))
echo "*";
# For the spaces
else
echo " ";
}
# For changing line
echo "\n";
}
}
// Driver Code
$n = 9;
D_Pattern($n)
?>
Javascript
输出 :
******
* *
* *
* *
* *
* *
* *
* *
******