cpp std::vector<int> vec = {10, 20, 30, 40, 50}; 使用下标操作符[]或at()方法来访问std::vector中的元素: 使用下标操作符[]: 这种方法直接通过索引访问元素,但需要注意索引越界的问题。如果索引超出范围,程序可能会产生未定义行为。 cpp int index = 2; if (index >= 0 &&...
1classTestIndex{2public:3intindex;4TestIndex(){5}6TestIndex(int_index):index(_index){7}8booloperator()(constTestIndex* t1,constTestIndex*t2){9printf("Operator():%d,%d/n",t1->index,t2->index);10returnt1->index < t2->index;11}12booloperator< (constTestIndex& ti)const{13printf("O...
vector<int>a = {1,2,3}; vector<int>b = {4,5}; a.insert(a.end(), b.begin(), b.end());//b数组从开始到结尾复制到a的尾部
//vector赋值 void PrintVector(vector<int>& v) { for (vector<int>::iterator it = v.begin()...
int main(){ std::vector<Price> prices; bool open = false; int index = 1; std::cout << "### before ###" << std::endl; while (index < 10){ if (open){ Price current = prices[prices.size() - 1]; current.close = -current.entry; open = false;...
std::type_index typeIndex = std::type_index(typeid(vec)); std::cout << "Type name: " << () << std::endl; } int main() { std::vector<int> intVector = {1, 2, 3}; std::vector<double> doubleVector = {1.1, 2.2, 3.3}; ...
std::vector<int>::iterator insertItr = nVec1.begin(); int index = 0; while(insertItr != nVec1.end()) { if(2 == index) { insertItr = nVec1.insert(insertItr , 8); //此时insert的返回值是迭代器,插入成功后iVector指向插入的位置 ...
std::vector<int> vec; std::shared_mutex vecMutex; int readFromVector(int index) { std::shared_lock<std::shared_mutex> lock(vecMutex); return vec[index]; } void writeToVector(int index, int value) { std::unique_lock<std::shared_mutex> lock(vecMutex); vec[index] = value; }Code...
int index = GetTextEditorIndex(selected_editor_path) + 1; Opened_TextEditors.insert(Opened_TextEditors.begin() + index, editor); } if(Opened_TextEditors.empty()) Opened_TextEditors.push_back(editor); } 当我运行它时,它会显示一条错误消息: ...
#include<iostream>#include<vector>intmain(){ std::vector<int> v = {1,2,3,4,5};// 添加元素v.push_back(6);// 访问元素std::cout <<"Element at index 2: "<< v[2] << std::endl; std::cout <<"First element: "<< v.front() << std::endl; ...