C/C++programtoillustratethe// Modifiers in vector#include<bits/stdc++.h>#include<vector>usingnamespacestd;intmain(){// Assign vectorvector<int>v;// fill the array with 10 five timesv.assign(5,10);cout<<"The vector elements are: ";for(inti=0;i<v.size();i++)cout<<v[i]<<" ";...
vector<int>intv(10,-1);//10 个int元素,每个初始化为 -1vector<int>strv(10,"hi");//10 个string元素,每个初始化为 hi vector重要的属性在于可以在运行时高效的添加元素,在元素已知的情况下,最好是动态的添加元素。 下面说明这种初始化情况 vector<int>intv(10);vector<string>strv(10); 此时 intv...
以及github地址:https://github.com/Puppas/STL-in-Cpp11
std::cout << "Elements in the vector after erasing: "; for (int element : myVector) { std::cout << element << " "; } std::cout << std::endl; // 清空向量并输出 myVector.clear(); std::cout << "Size of the vector after clearing: " << myVector.size() << std::endl; ...
reset the elements in the vector to zero for(vector<int>::size_type ix = 0; ix != ivec.size(); ++ix) ivec[ix] = 0; 和string类型的下标操作符一样,vector下标操作的结果为左值,因此可以像循环体中所做的那样实现写入。另外,和string对象的下标操作类似,这里用size_type类型作为vector下标的类型...
eg:P73\01.cpp #include <vector> #include <iostrem> using namespace std; int main(void) { //vector<int> 是一个模板类,定义一个对象v会引发模板类的构造函数的调用 vector<int> v;//在这里打个断点,跟踪 return 0; } 1. 2. 3.
#ifndefTOUR_H_#defineTOUR_H_#include<vector>usingnamespacestd;classtour{public://variablesintteamID; vector<int> tourseq;//this is where the error occurs//functionstour(int); };#endif/* TOUR_H_ */ tour.cpp #include<vector>#include"tour.h"usingnamespacestd; ...
cpp [sly@VM-0-3-centos 20220114]$ g++ testVector.cpp -std=c++11 [sly@VM-0-3-centos 20220114]$ ./a.out Segmentation fault 从上述三个例子中可以看到:SGI STL中,迭代器失效后,代码并不一定会崩溃,但是运行结果肯定不对,如果it不在begin和end范围内,肯定会崩溃的。 string迭代器失效 与vector类似,...
//構造一個内存分配器, 直接copy cpp官網例子即可 template<class T> struct Mallocator { typedef T value_type; Mallocator() = default; template<class U> constexpr Mallocator(const Mallocator <U>&) noexcept {} [[nodiscard]] T* allocate(std::size_t n) { ...
__cpp_lib_incomplete_container_elements201505L(C++17)Minimal incomplete type support (since C++17) Allocator-An allocator that is used to acquire/release memory and to construct/destroy the elements in that memory. The type must meet the requirements ofAllocator.The behavior is undefined(until C++...