本文概述
- 建议:在继续解决方案之前, 请先在"实践"上解决它。
- C ++
- Java
- Python3
- C#
- 的PHP
例子:
Input :arr[] = {1, 2, 0, 4, 3, 0, 5, 0};
Output : arr[] = {1, 2, 4, 3, 5, 0, 0};
Input : arr[]= {1, 2, 0, 0, 0, 3, 6};
Output : arr[] = {1, 2, 3, 6, 0, 0, 0};
推荐:请在"实践首先, 在继续解决方案之前。
有很多方法可以解决此问题。以下是解决此问题的简单有趣的方法。
从左到右遍历给定的数组" arr"。遍历时, 维护数组中非零元素的数量。让计数为"计数"。对于每个非零元素arr [i], 将其放在" arr [count]"处, 并递增" count"。完全遍历之后, 所有非零元素都已移至前端, 并且" count"被设置为前0的索引。现在我们要做的就是运行一个循环, 使所有元素从" count"到结束都为零。的数组。
下面是上述方法的实现。
C ++
// A C++ program to move all zeroes at the end of array
#include <
iostream>
using namespace std;
// Function which pushes all zeros to end of an array.
void pushZerosToEnd( int arr[], int n)
{
int count = 0;
// Count of non-zero elements// Traverse the array. If element encountered is non-
// zero, then replace the element at index 'count'
// with this element
for ( int i = 0;
i <
n;
i++)
if (arr[i] != 0)
arr[count++] = arr[i];
// here count is
// incremented// Now all non-zero elements have been shifted to
// front and'count' is set as index of first 0.
// Make all elements 0 from count to end.
while (count <
n)
arr[count++] = 0;
}// Driver program to test above function
int main()
{
int arr[] = {1, 9, 8, 4, 0, 0, 2, 7, 0, 6, 0, 9};
int n = sizeof (arr) / sizeof (arr[0]);
pushZerosToEnd(arr, n);
cout <
<
"Array after pushing all zeros to end of array :\n" ;
for ( int i = 0;
i <
n;
i++)
cout <
<
arr[i] <
<
" " ;
return 0;
}
Java
/* Java program to push zeroes to back of array */
import java.io.*;
class PushZero
{
// Function which pushes all zeros to end of an array.
static void pushZerosToEnd( int arr[], int n)
{
int count = 0 ;
// Count of non-zero elements// Traverse the array. If element encountered is
// non-zero, then replace the element at index 'count'
// with this element
for ( int i = 0 ;
i <
n;
i++)
if (arr[i] != 0 )
arr[count++] = arr[i];
// here count is
// incremented// Now all non-zero elements have been shifted to
// front and 'count' is set as index of first 0.
// Make all elements 0 from count to end.
while (count <
n)
arr[count++] = 0 ;
}/*Driver function to check for above functions*/
public static void main (String[] args)
{
int arr[] = { 1 , 9 , 8 , 4 , 0 , 0 , 2 , 7 , 0 , 6 , 0 , 9 };
int n = arr.length;
pushZerosToEnd(arr, n);
System.out.println( "Array after pushing zeros to the back: " );
for ( int i= 0 ;
i<
n;
i++)
System.out.print(arr[i]+ " " );
}
}
/* This code is contributed by Devesh Agrawal */
Python3
# Python3 code to move all zeroes
# at the end of array# Function which pushes all
# zeros to end of an array.
def pushZerosToEnd(arr, n):
count = 0 # Count of non-zero elements# Traverse the array. If element
# encountered is non-zero, then
# replace the element at index
# 'count' with this element
for i in range (n):
if arr[i] ! = 0 :# here count is incremented
arr[count] = arr[i]
count + = 1# Now all non-zero elements have been
# shifted to front and 'count' is set
# as index of first 0. Make all
# elements 0 from count to end.
while count <
n:
arr[count] = 0
count + = 1# Driver code
arr = [ 1 , 9 , 8 , 4 , 0 , 0 , 2 , 7 , 0 , 6 , 0 , 9 ]
n = len (arr)
pushZerosToEnd(arr, n)
print ( "Array after pushing all zeros to end of array:" )
print (arr)# This code is contributed by "Abhishek Sharma 44"
C#
/* C# program to push zeroes to back of array */
using System;
class PushZero
{
// Function which pushes all zeros
// to end of an array.
static void pushZerosToEnd( int []arr, int n)
{
// Count of non-zero elements
int count = 0;
// Traverse the array. If element encountered is
// non-zero, then replace the element
// at index a..counta.. with this element
for ( int i = 0;
i <
n;
i++)
if (arr[i] != 0)// here count is incremented
arr[count++] = arr[i];
// Now all non-zero elements have been shifted to
// front and a..counta.. is set as index of first 0.
// Make all elements 0 from count to end.
while (count <
n)
arr[count++] = 0;
}// Driver function
public static void Main ()
{
int []arr = {1, 9, 8, 4, 0, 0, 2, 7, 0, 6, 0, 9};
int n = arr.Length;
pushZerosToEnd(arr, n);
Console.WriteLine( "Array after pushing all zeros to the back: " );
for ( int i = 0;
i <
n;
i++)
Console.Write(arr[i] + " " );
}
}
/* This code is contributed by Anant Agrawal */
的PHP
<
?php
// A PHP program to move all
// zeroes at the end of array// Function which pushes all
// zeros to end of an array.
function pushZerosToEnd(&
$arr , $n )
{
// Count of non-zero elements
$count = 0;
// Traverse the array. If
// element encountered is
// non-zero, then replace
// the element at index
// 'count' with this element
for ( $i = 0;
$i <
$n ;
$i ++)
if ( $arr [ $i ] != 0)
// here count is incremented
$arr [ $count ++] = $arr [ $i ];
// Now all non-zero elements
// have been shifted to front
// and 'count' is set as index
// of first 0. Make all elements
// 0 from count to end.
while ( $count <
$n )
$arr [ $count ++] = 0;
}// Driver Code
$arr = array (1, 9, 8, 4, 0, 0, 2, 7, 0, 6, 0, 9);
$n = sizeof( $arr );
pushZerosToEnd( $arr , $n );
echo "Array after pushing all " .
"zeros to end of array :\n" ;
for ( $i = 0;
$i <
$n ;
$i ++)
echo $arr [ $i ] . " " ;
// This code is contributed
// by ChitraNayal
?>
输出如下:
Array after pushing all zeros to end of array :1 9 8 4 2 7 6 9 0 0 0 0
时间复杂度:O(n)其中n是输入数组中元素的数量。
辅助空间:O(1)
【算法设计(将所有零移动到数组末尾详细代码实现)】本文作者: 钱德拉·普拉卡什(Chandra Prakash)。如果发现任何不正确的地方, 或者想分享有关上述主题的更多信息, 请写评论。
推荐阅读
- 原型设计和制作模型 – 软件工程
- PHP array_diff_uassoc()函数用法介绍
- JavaScript日期Date对象函数参考
- 35款最佳免费音乐制作软件应用推荐合集(你最喜欢哪个())
- C语言中的wait系统调用详细指南
- Perl构造函数和析构函数用法指南
- 在Python中使用JSON数据经典指南
- JavaScript删除运算符delete用法介绍
- 数据结构(Python元组用法详细指南)