程序打印半菱形星形图案
原文:https://www . geesforgeks . org/program-to-print-半菱形-star-pattern/
给定一个整数 N ，任务是打印半菱形星图案。
* * *
- * *
示例:
Input: N = 3
Output:
*
**
***
**
*
Input: N = 6
Output:
*
**
***
****
*****
******
*****
****
***
**
*
做法:思路是将图案分成两半，即上半部分和下半部分。然后在循环的帮助下单独打印。打印上半部和下半部的关键观察如下所述:
-
上半部分:图案的上半部分包含星' *按递增顺序排列，其中 i 第行包含以下数量的星:
```java Number of '*' in ith line =
```
-
Lower Half: The lower half of the pattern contains star ‘*’ in decreasing order where ith line contains following number of star:
```java Number of '*' in ith line =
```
下面是上述方法的实现:
C++
```java // C++ implementation to print the // half diamond star pattern
include
using namespace std;
// Function to print the // half diamond star pattern void halfDiamondStar(int N) { int i, j;
// Loop to print the upper half // diamond pattern for (i = 0; i < N; i++) { for (j = 0; j < i + 1; j++) cout << "*"; cout << "\n"; }
// Loop to print the lower half // diamond pattern for (i = 1; i < N; i++) { for (j = i; j < N; j++) cout << "*"; cout << "\n"; } }
// Driver Code int main() { int N = 5;
// Function Call halfDiamondStar(N); } ```
Java 语言(一种计算机语言，尤用于创建网站)
```java // Java implementation to print the // half diamond star pattern import java.util.*;
class GFG{
// Function to print the // half diamond star pattern static void halfDiamondStar(int N) { int i, j;
// Loop to print the upper half // diamond pattern for (i = 0; i < N; i++) { for (j = 0; j < i + 1; j++) System.out.print("*"); System.out.print("\n"); }
// Loop to print the lower half // diamond pattern for (i = 1; i < N; i++) { for (j = i; j < N; j++) System.out.print("*"); System.out.print("\n"); } }
// Driver Code public static void main(String[] args) { int N = 5;
// Function Call halfDiamondStar(N); } }
// This code is contributed by Rohit_ranjan ```
Python 3
```java
Python3 implementation to print the
half diamond star pattern
Function to print the
half diamond star pattern
def halfDiamondStar(N):
# Loop to print the upper half # diamond pattern for i in range(N):
for j in range(0, i + 1): print("*", end = "") print()
# Loop to print the lower half # diamond pattern for i in range(1, N):
for j in range(i, N): print("*", end = "") print()
Driver Code
N = 5;
Function Call
halfDiamondStar(N);
This code is contributed by skylags
```
C
```java // C# implementation to print the // half diamond star pattern using System;
class GFG{
// Function to print the // half diamond star pattern static void halfDiamondStar(int N) { int i, j;
// Loop to print the upper half // diamond pattern for(i = 0; i < N; i++) { for(j = 0; j < i + 1; j++) Console.Write("*"); Console.Write("\n"); }
// Loop to print the lower half // diamond pattern for(i = 1; i < N; i++) { for(j = i; j < N; j++) Console.Write("*"); Console.Write("\n"); } }
// Driver Code public static void Main(String[] args) { int N = 5;
// Function Call halfDiamondStar(N); } }
// This code is contributed by Rohit_ranjan ```
Output:
```java * **
** *
```
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