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...
1#include <iostream>2#include <vector>3#include <string>45usingnamespacestd;67constintNUM =5;89intmain()10{11vector<int>vec1(NUM);12vector<int>vec2(NUM);1314inti;15for(inti =0; i < NUM; i++)16{17vec1[i] = i *5;18vec2[i] = i +3;19}2021for(inti =0; i < NUM; i+...
#include<iostream>#include<stdint.h>#include<vector>using namespace std;intmain(){std::vector<uint8_t>temp0(0,0);cout<<"vector size:"<<temp0.size()<<endl;std::vector<uint8_t>temp1();//cout << "vector size:" << temp1.size() << endl;return0;} 1.构造函数 vector():创建一...
- 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<vector> 中的成员有关于size 的分析; 关于去除向量中的元素: pop_back()/// 最后的数据; 1 1220 对于数据的清除后归为0; pop_back(); 向量和函数: 对于浮点类型的总和求法; double sum(std::vector<double> value){ double tolto=0; ...
#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 ...
//展示 vector 用法#include<iostream>#include<vector>usingstd::cout;usingstd::endl;usingstd::string;usingstd::vbector;voidtest_01(){vector<int>v;v.push_back(1);v.push_back(2);v.push_back(3);v.push_back(4);v.push_back(5);//遍历for(size_t i=0;i<v.size();i++){cout<<v[...
#include <vector> class Base { public: virtual void run() { std::cout << "Base::run()" << std::endl; } }; class Derived : public Base { public: void run() override { std::cout << "Derived::run()" << std::endl;
std::vector 是封装动态数组的顺序容器。 std::pmr::vector 是使用多态分配器的模板别名。 例子1 vector内存布局 #include <iostream>#include <vector> int main(){ std::vector<int> v {2,4,5}; v.push_back(6); v.pop_back(); v[1] =3; std::cout << v[2] << std::endl;for(int x...
obj.size() 1. 如 #include <string.h> #include <vector> #include <iostream> using namespace std; int main() { vector<int>obj;//创建一个向量存储容器 int for(int i=0;i<10;i++) // push_back(elem)在数组最后添加数据 { obj.push_back(i); ...