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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # 搜索,插入和刪除未排序的數組 > 原文: [https://www.geeksforgeeks.org/search-insert-and-delete-in-an-unsorted-array/](https://www.geeksforgeeks.org/search-insert-and-delete-in-an-unsorted-array/) 在此后搜索中,討論了未排序數組中的插入和刪除操作。 **搜索操作** 在未排序的數組中,搜索操作可以通過從第一個元素到最后一個元素的線性遍歷來執行。 ![](https://img.kancloud.cn/18/0d/180d245af6428f57786d2d731dddaf2a_800x323.png) ## C++ ```cpp // C++ program to implement linear? // search in unsorted array #include<bits/stdc++.h> using namespace std; // Function to implement search operation? int findElement(int arr[], int n,? ????????????????int key) { ????int i; ????for (i = 0; i < n; i++) ????????if (arr[i] == key) ????????????return i; ????return -1; } // Driver Code int main() { ????int arr[] = {12, 34, 10, 6, 40}; ????int n = sizeof(arr) / sizeof(arr[0]); ????// Using a last element as search element ????int key = 40; ????int position = findElement(arr, n, key); ????if (position == - 1) ????????cout << "Element not found"; ????else ????????cout << "Element Found at Position: "? ?????????????<< position + 1; ????return 0; } // This code is contributed? // by Akanksha Rai ``` ## C ``` // C program to implement linear? // search in unsorted array #include<stdio.h> // Function to implement search operation? int findElement(int arr[], int n,? ????????????????int key) { ????int i; ????for (i = 0; i < n; i++) ????????if (arr[i] == key) ????????????return i; ????return -1; } // Driver Code int main() { ????int arr[] = {12, 34, 10, 6, 40}; ????int n = sizeof(arr) / sizeof(arr[0]); ????// Using a last element as search element ????int key = 40; ????int position = findElement(arr, n, key); ????if (position == - 1) ????????printf("Element not found"); ????else ????????printf("Element Found at Position: %d", position + 1 ); ????return 0; } ``` ## Java ```java // Java program to implement linear? // search in unsorted arrays class Main { ????// Function to implement? ????// search operation? ????static int findElement(int arr[], int n,? ???????????????????????????int key) ????{ ????????for (int i = 0; i < n; i++) ????????????if (arr[i] == key) ????????????????return i; ????????return -1; ????} ????// Driver Code ????public static void main(String args[]) ????{ ????????int arr[] = {12, 34, 10, 6, 40}; ????????int n = arr.length; ????????// Using a last element as search element ????????int key = 40; ????????int position = findElement(arr, n, key); ????????if (position == - 1) ????????????System.out.println("Element not found"); ????????else ????????????System.out.println("Element Found at Position: "? ????????????????????????????????+ (position + 1)); ????} } ``` ## Python ``` # Python program for searching in # unsorted array def findElement(arr, n, key): ????for i in range (n): ????????if (arr[i] == key): ????????????return i ????return -1 arr = [12, 34, 10, 6, 40] key = 40 n = len(arr) #search operation index = findElement(arr, n, key) if index != -1: ????print ("element found at position: " + str(index + 1 ))? else: ????print ("element not found") # Thanks to Aditi Sharma for contributing? # this code???? ``` ## C# ```cs // C# program to implement linear? // search in unsorted arrays using System; class main { ????// Function to implement? ????// search operation? ????static int findElement(int []arr, int n,? ???????????????????????????int key) ????{ ????????for (int i = 0; i < n; i++) ????????????if (arr[i] == key) ????????????????return i; ????????return -1; ????} ????// Driver Code ????public static void Main() ????{ ????????int []arr = {12, 34, 10, 6, 40}; ????????int n = arr.Length; ????????// Using a last element as? ????????// search element ????????int key =40; ????????int position = findElement(arr,n,key); ????????if (position == - 1) ????????Console.WriteLine("Element not found"); ????????else ????????Console.WriteLine("Element Found at Position: " ????????????????????????????+ (position+1)); ????} } //? This code is contributed by vt_m. ``` ## PHP ```php <?php // PHP program to implement linear? // search in unsorted array // Function to implement // search operation? function findElement($arr, $n, $key) { ????$i; ????for ($i = 0; $i < $n; $i++) ????????if ($arr[$i] == $key) ????????????return $i; ????return -1; } // Driver Code $arr = array(12, 34, 10, 6, 40); $n = sizeof($arr); // Using a last element // as search element $key = 40; $position = findElement($arr, $n, $key); if ($position == - 1) ????echo("Element not found"); else ????echo("Element Found at Position: " . ($position + 1)); // This code is contributed by Ajit. ?> ``` Output: ``` Element Found at Position: 5 ``` **在末尾插入** 在未排序的數組中,插入操作比已排序的數組要快,這是因為我們不必關心元素放置的位置。 ![](https://img.kancloud.cn/3e/7e/3e7eef1f690c058df5a033fca5c489e8_800x437.png) ## C++ ``` // C++ program to implement insert? // operation in an unsorted array. #include <iostream> using namespace std; // Inserts a key in arr[] of given capacity. // n is current size of arr[]. This? // function returns n + 1 if insertion // is successful, else n. int insertSorted(int arr[], int n,? ????????????????int key, ????????????????int capacity) { ????// Cannot insert more elements if n is? ????// already more than or equal to capcity ????if (n >= capacity) ????return n; ????arr[n] = key; ????return (n + 1); } // Driver Code int main() { ????int arr[20] = {12, 16, 20, 40, 50, 70}; ????int capacity = sizeof(arr) / sizeof(arr[0]); ????int n = 6; ????int i, key = 26; ????cout << "\n Before Insertion: "; ????for (i = 0; i < n; i++) ????????cout << arr[i]<< " "; ????// Inserting key ????n = insertSorted(arr, n, key, capacity); ????cout << "\n After Insertion: "; ????for (i = 0; i < n; i++) ????????cout << arr[i] << " "; ????return 0; } // This code is contributed by SHUBHAMSINGH10 ``` ## C ``` // C program to implement insert? // operation in an unsorted array. #include<stdio.h> // Inserts a key in arr[] of given capacity. // n is current size of arr[]. This? // function returns n + 1 if insertion // is successful, else n. int insertSorted(int arr[], int n,? ?????????????????int key, ?????????????????int capacity) { ????// Cannot insert more elements if n is? ????// already more than or equal to capcity ????if (n >= capacity) ???????return n; ????arr[n] = key; ????return (n + 1); } // Driver Code int main() { ????int arr[20] = {12, 16, 20, 40, 50, 70}; ????int capacity = sizeof(arr) / sizeof(arr[0]); ????int n = 6; ????int i, key = 26; ????printf("\n Before Insertion: "); ????for (i = 0; i < n; i++) ????????printf("%d? ", arr[i]); ????// Inserting key ????n = insertSorted(arr, n, key, capacity); ????printf("\n After Insertion: "); ????for (i = 0; i < n; i++) ????????printf("%d? ",arr[i]); ????return 0; } ``` ## Java ```java // Java program to implement insert? // operation in an unsorted array. class Main { ????// Function to insert a given key in? ????// the array. This function returns n+1? ????// if insertion is successful, else n.? ????static int insertSorted(int arr[], int n,? ????????????????????????????int key,? ????????????????????????????int capacity) ????{ ????????// Cannot insert more elements if n? ????????// is already more than or equal to? ????????// capcity ????????if (n >= capacity) ???????????return n; ????????arr[n] = key; ????????return (n + 1); ????} ????// Driver Code ????public static void main (String[] args) ????{??? ????????int[] arr = new int[20];? ????????arr[0] = 12; ????????arr[1] = 16; ????????arr[2] = 20; ????????arr[3] = 40;? ????????arr[4] = 50; ????????arr[5] = 70; ????????int capacity = 20; ????????int n = 6; ????????int i, key = 26; ????????System.out.print("Before Insertion: "); ????????for (i = 0; i < n; i++) ????????????System.out.print(arr[i]+" "); ????????// Inserting key ????????n = insertSorted(arr, n, key, capacity); ????????System.out.print("\n After Insertion: "); ????????for (i = 0; i < n; i++) ????????????System.out.print(arr[i]+" "); ????} } ``` ## Python ``` # Python program for inserting # an element in an unsorted array # method to insert element def insert(arr, element): ????arr.append(element) # declaring array and key to insert? arr = [12, 16, 20, 40, 50, 70] key = 26 # array before inserting an element print ("Before Inserting: ") print (arr) # array after Inserting element? insert(arr, key) print("After Inserting: ") print (arr) # Thanks to Aditi Sharma for contributing? # this code???? ``` ## C# ``` // C# program to implement insert? // operation in an unsorted array. using System; class main { ????// Function to insert a given? ????// key in the array. This? ????// function? returns n + 1? ????// if insertion is successful, ????// else n.? ????static int insertSorted(int []arr, int n,? ????????????????????????????int key,? ????????????????????????????int capacity) ????{ ????????// Cannot insert more elements ????????// if n is already more than? ????????// or equal to capcity? ????????if (n >= capacity) ????????return n; ????????arr[n] = key; ????????return (n + 1); ????} ????// Driver Code ????public static void Main () ????{? ????????int[] arr = new int[20];? ????????arr[0] = 12; ????????arr[1] = 16; ????????arr[2] = 20; ????????arr[3] = 40;? ????????arr[4] = 50; ????????arr[5] = 70; ????????int capacity = 20; ????????int n = 6; ????????int i, key = 26; ????????Console.Write("Before Insertion: "); ????????for (i = 0; i < n; i++) ????????????Console.Write(arr[i]+" "); ????????????Console.WriteLine(); ????????// Inserting key ????????n = insertSorted(arr, n, key, capacity); ????????Console.Write("After Insertion: "); ????????for (i = 0; i < n; i++) ????????????Console.Write(arr[i]+" "); ????} } // This code is contributed by vt_m. ``` ## PHP ```php <?php // PHP program to implement insert? // operation in an unsorted array.? // Inserts a key in arr[] of given? // capacity. n is current size of arr[].? // This function returns n + 1 if? // insertion is successful, else n.? function insertSorted(&$arr, $n, $key,? ???????????????????????????$capacity)? {? ????// Cannot insert more elements if n is? ????// already more than or equal to capcity? ????if ($n >= $capacity)? ????????return $n;? ????array_push($arr, $key);? ????return ($n + 1);? }? // Driver Code $arr = array(12, 16, 20, 40, 50, 70);? $capacity = 20;? $n = 6;? $key = 26;? echo "Before Insertion: ";? for ($i = 0; $i < $n; $i++)? ????echo $arr[$i] . " ";? // Inserting key? $n = insertSorted($arr, $n,? ??????????????????$key, $capacity);? echo "\nAfter Insertion: ";? for ($i = 0; $i < $n; $i++)? ????echo $arr[$i] . " ";? // This code is contributed by // Rajput-Ji ?> ``` **輸出**: ``` Before Insertion: 12 16 20 40 50 70 After Insertion: 12 16 20 40 50 70 26 ``` **刪除操作** 在刪除操作中,使用[線性搜索](http://quiz.geeksforgeeks.org/linear-search/)搜索要刪除的元素,然后執行刪除操作,然后移動元素。 ![](https://img.kancloud.cn/98/5a/985ae07e589eaf7be7b6607f780a9995_800x437.png) ## C++ ``` // C++ program to implement delete operation in a? // unsorted array? #include <iostream> using namespace std; // To search a key to be deleted? int findElement(int arr[], int n,? ????????????????int key);? // Function to delete an element? int deleteElement(int arr[], int n,? ????????????????int key)? {? ????// Find position of element to be deleted? ????int pos = findElement(arr, n, key);? ????if (pos == - 1)? ????{? ????????cout << "Element not found";? ????????return n;? ????}? ????// Deleting element? ????int i;? ????for (i = pos; i < n - 1; i++)? ????????arr[i] = arr[i + 1];? ????return n - 1;? }? // Function to implement search operation? int findElement(int arr[], int n, int key)? {? ????int i;? ????for (i = 0; i < n; i++)? ????????if (arr[i] == key)? ????????????return i;? ????return - 1;? }? // Driver code? int main()? {? ????int i;? ????int arr[] = {10, 50, 30, 40, 20};? ????int n = sizeof(arr) / sizeof(arr[0]);? ????int key = 30;? ????cout << "Array before deletion\n";? ????for (i = 0; i < n; i++)? ????cout << arr[i] <<" " ;? ????n = deleteElement(arr, n, key);? ????cout << "\n\nArray after deletion\n";? ????for (i = 0; i < n; i++)? ????cout << arr[i] << " ";? ????return 0;? }? // This code is contributed by shubhamsingh10 ``` ## C ``` // C program to implement delete operation in a // unsorted array #include<stdio.h> // To search a key to be deleted int findElement(int arr[], int n, ????????????????int key); // Function to delete an element int deleteElement(int arr[], int n,? ??????????????????int key) { ????// Find position of element to be deleted ????int pos = findElement(arr, n, key); ????if (pos == - 1) ????{ ????????printf("Element not found"); ????????return n; ????} ????// Deleting element ????int i; ????for (i = pos; i < n - 1; i++) ????????arr[i] = arr[i + 1]; ????return n - 1; } // Function to implement search operation? int findElement(int arr[], int n, int key) { ????int i; ????for (i = 0; i < n; i++) ????????if (arr[i] == key) ????????????return i; ????return - 1; } // Driver code int main() { ????int i; ????int arr[] = {10, 50, 30, 40, 20}; ????int n = sizeof(arr) / sizeof(arr[0]); ????int key = 30; ????printf("Array before deletion\n"); ????for (i = 0; i < n; i++) ??????printf("%d? ", arr[i]); ????n = deleteElement(arr, n, key); ????printf("\nArray after deletion\n"); ????for (i = 0; i < n; i++) ??????printf("%d? ", arr[i]); ????return 0; } ``` ## Java ```java // Java program to implement delete // operation in an unsorted array class Main { ????// function to search a key to? ????// be deleted ????static int findElement(int arr[], int n, int key) ????{ ????????int i; ????????for (i = 0; i < n; i++) ????????????if (arr[i] == key) ????????????????return i; ????????return -1; ????}? ????// Function to delete an element ????static int deleteElement(int arr[], int n, int key) ????{ ????????// Find position of element to be? ????????// deleted ????????int pos = findElement(arr, n, key); ????????if (pos == -1) ????????{ ????????????System.out.println("Element not found"); ????????????return n; ????????} ????????// Deleting element ????????int i; ????????for (i = pos; i< n - 1; i++) ????????????arr[i] = arr[i + 1]; ????????return n - 1; ????} ????// Driver Code ????public static void main(String args[]) ????{ ????????int i; ????????int arr[] = {10, 50, 30, 40, 20}; ????????int n = arr.length; ????????int key = 30; ????????System.out.println("Array before deletion"); ????????for (i=0; i<n; i++) ??????????System.out.print(arr[i] + " "); ????????n = deleteElement(arr, n, key); ????????System.out.println("\n\nArray after deletion"); ????????for (i=0; i<n; i++) ??????????System.out.print(arr[i]+" "); ????}? } ``` ## Python ``` # Python program to delete an element # from an unsorted array # Declaring array and key to delete arr = [10, 50, 30, 40, 20] key = 30 print("Array before deletion:") print arr # deletes key if found in the array? # otherwise shows error not in list arr.remove(key) print("Array after deletion") print(arr) # This code is contributed by Aditi Sharma.? ``` ## C# ``` // C# program to implement delete // operation in an unsorted array using System; class main { ????// Function to search a?? ????// key to be deleted ????static int findElement(int []arr,? ???????????????????????????int n,? ???????????????????????????int key) ????{ ????????int i; ????????for (i = 0; i < n; i++) ????????????if (arr[i] == key) ????????????????return i; ????????return -1; ????}? ????// Function to delete an element ????static int deleteElement(int []arr, ?????????????????????????????int n,? ?????????????????????????????int key) ????{ ????????// Find position of element? ????????// to be deleted ????????int pos = findElement(arr, n, key); ????????if (pos == - 1) ????????{ ????????????Console.WriteLine("Element not found"); ????????????return n; ????????} ????????// Deleting element ????????int i; ????????for (i = pos; i < n - 1; i++) ????????????arr[i] = arr[i + 1]; ????????return n - 1; ????} ????// Driver Code ????public static void Main() ????{ ????????int i; ????????int []arr = {10, 50, 30, 40, 20}; ????????int n = arr.Length; ????????int key = 30; ????????Console.Write("Array before deletion "); ????????for (i = 0; i < n; i++) ????????Console.Write(arr[i] + " "); ????????Console.WriteLine(); ????????n = deleteElement(arr, n, key); ????????Console.Write("Array after deletion "); ????????for (i = 0; i < n; i++) ????????Console.Write(arr[i]+" "); ????}? } // This code is contributed by vt_m. ``` ## PHP ```php <?php // PHP program to implement delete?? // operation in an unsorted array? // To search a key to be deleted? function findElement(&$arr, $n, $key) {? ????for ($i = 0; $i < $n; $i++)? ????????if ($arr[$i] == $key)? ????????????return $i;? ????return -1;? }? // Function to delete an element? function deleteElement(&$arr, $n, $key)? {? ????// Find position of element to? ????// be deleted? ????$pos = findElement($arr, $n, $key);? ????if ($pos == -1)? ????{? ????????echo "Element not found";? ????????return $n;? ????}? ????// Deleting element? ????for ($i = $pos; $i < $n - 1; $i++)? ????????$arr[$i] = $arr[$i + 1];? ????return $n - 1;? }? // Driver code? $arr = array(10, 50, 30, 40, 20);? $n = count($arr);? $key = 30;? echo "Array before deletion\n";? for ($i = 0; $i < $n; $i++)? echo $arr[$i] . " ";? $n = deleteElement($arr, $n, $key);? echo "\nArray after deletion\n";? for ($i = 0; $i < $n; $i++)? echo $arr[$i] . " ";? // This code is contributed by // Rajput-Ji ?> ``` **輸出**: ``` Array before deletion 10 50 30 40 20 Array after deletion 10 50 40 20 ``` **時間復雜度**: **搜索**:`O(n)` **插入**:`O(1)` **刪除**: 上) Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above
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                              哎呀哎呀视频在线观看