C++ std::vector使用简介 使用vector,需添加头文件#include<vector>, 要使用sort或find,则需要添加头文件#include<algorithm>。 为了简化书写,需在.h中增加using namespace std; 1.vector的初始化及赋值 1std::vector<int> nVec;//空对象2std::vector<int> nVec(5,-1);//创建了一个包含5个元素且值为-1...
#include<vector> #include<iostream> intmain() { std::vector<int> vector1, vector2; for(inti =1; i <10; ++i) { vector1.push_back(i); vector2.push_back(i); } // 直接比较 if(vector1 == vector2) { std::cout<<"vector1 == vector2"<<std::endl; } else { std::cout<<"v...
- 例如，使用迭代器遍历`std::vector`：#include <iostream> #include <vector> int main() { std::vector<int> myVector = {1, 2, 3, 4, 5};std::vector<int>::iterator it;for (it = myVector.begin(); it!= myVector.end(); ++it) { std::cout << *it << " ";} return 0;} `...
#include <iostream> #include <vector> int main(int argc, char const *argv[]) { std::vector<int> vi; vi.reserve(1024); for (int i = 0; i < 1024; i++) vi.push_back(i); std::cout << vi.size() << " " << vi.capacity() << std::endl; //1024 1024 std::vector<int>...
#include "ui_mainwindow.h" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); // 定义 std::vector<int> nNullVec;// 空对象 std::vector<int> nVec1(5, -1);// 包含10个元素,且值为-1 ...
#include<iostream>#include<vector>#include<algorithm>intmain(){std::vector<int>vec={1,2,3,4,5};inttarget=3;autoit=std::find(vec.begin(),vec.end(),target);if(it!=vec.end()){std::cout<<"Vector contains "<<target<<std::endl;}else{std::cout<<"Vector does not contain "<<...
#include <stdio.h> #include <unistd.h> #include <iostream> #include <vector> class MyClass { public: MyClass(int value) :ptr_(new int(value)) { std::cout << "Default constructor called: MyClass(int value)" << std::endl; } MyClass(const MyClass& other) // 拷贝构造函数 : ptr...
使用vector,必须加上:#include 1.初始化vector,一般有这几种方式: std::vector<std::wstring>v1;//创建一个空的wstring类型的vector std::vector<std::wstring>v2(3,L"c");//创建一个容量为3,全部初始化L"c" std::vector<int>v3(5);//创建容量为5,数据类型为int的vector ...
void * memmove ( void * destination, const void * source, size_t num ); 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #include<stdio.h>#include<stdlib.h>#include<assert.h>void*memmove(void*dest,void*source,size_t count){char*ret...
#include <vector>Code language: C++ (cpp) By adding this line at the beginning of our source code (usually after other standard library headers), we make all the member functions and capabilities of std::vector accessible. Namespace consideration: using namespace std; C++ namespaces are a way...