stl swap函數

C ++ STL vector :: swap()函數 (C++ STL vector::swap() function)

vector::swap() function is used to swap/exchange the content of two vectors with the same type, their sizes may differ.

vector :: swap()函數用于交換/交換相同類型的兩個向量的內容，它們的大小可能不同。

The contents of vector1 are exchanged with the content of vector2. Vectors must be of the same type i.e. either both of them are of type int, string, long, etc.

vector1的內容與vector2的內容交換。 向量必須具有相同的類型，即兩個向量均為int，string，long等類型。

This is not necessary that both of the vectors must have the same size i.e. size of both the vectors may differ from each other.

兩個矢量必須具有相同的大小是不必要的，即，兩個矢量的大小可以彼此不同。

Note: Both the containers/vectors are modified after the call of this function.

注意：調用此函數后，兩個容器/向量均被修改。

Syntax of vector::swap() function

vector :: swap()函數的語法

vector1.swap(vector2);

Parameter(s): vector2 – another vector with that we have to swap the content of first vector vector1.

參數： vector2 –與另一個向量我們必須交換第一個向量vector1的內容。

Return value: void – it returns nothing.

返回值： void –不返回任何內容。

Time Complexity: O(1) i.e constant order

時間復雜度：O(1)，即恒定階數

Example:

例：

Input:vector<int> vector1{ 1, 2, 3, 4, 5 };vector<int> vector2{ 6, 7, 8, 9, 10 };Function call:vector1.swap(vector2);Output:Vector1: 1 2 3 4 5Vector2: 6 7 8 9 10 After swapping...Vector1: 6 7 8 9 10 Vector2: 1 2 3 4 5

C ++程序演示vector :: swap()函數的示例 (C++ program to demonstrate example of vector::swap() function)

#include <iostream> #include <vector> using namespace std;int main() {vector<int> vector1{ 1, 2, 3, 4, 5 };vector<int> vector2{ 6, 7, 8, 9, 10 };// Before Swapping vector-1 and vector-2cout << "Vector 1" << endl;for (auto i : vector1)cout << i << " ";cout << "\n";cout << "Vector 2" << endl;for (auto i : vector2)cout << i << " ";cout << "\n";// Swapping vector-1 and vector-2vector1.swap(vector2);// After swapping vector-1 and vector-2cout << "Vector 1" << endl;for (auto i : vector1)cout << i << " ";cout << "\n";cout << "Vector 2" << endl;for (auto i : vector2)cout << i << " ";return 0; }

Output

輸出量

Vector 1 1 2 3 4 5 Vector 2 6 7 8 9 10 Vector 1 6 7 8 9 10 Vector 2 1 2 3 4 5

翻譯自: https://www.includehelp.com/stl/vector-swap-method-with-example.aspx

stl swap函數

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