对比array是静态空间一旦配置了就不能改变大小。 vector的动态增加大小的时候,并不是在原有的空间上持续新的空间(无法保证原空间的后面还有可供配置的空间),而是以原大小的两倍另外配置一块较大的空间,然后将原内容拷贝过来,并释放原空间。在VS下是1.5倍扩容,在GCC下是2倍扩容。 在原来空间不够存储新值时,每次...
//vector<int>::iterator it; //C++11之前用的,11之后可以用auto for(autoit=num.begin(); it!=num.end(); ++it) { cout << *it <<" "; } cout << endl; num.insert(num.begin()+2,3,10);//在num[2]之前加3个10 cout <<"Inserted array:\n"; for(autoit=num.begin(); it!=num....
Container (容器) array Alogrithm (算法) Adapters (配接器) 用来实现容器之间的转接 面向过程--》面向对象-》基于对象-》泛型 代码 #include <iostream>#include <vector>//容器 #include <algorithm>//算法usingnamespacestd;//专么实现一个类模板,实现打印//类模板实现了方法 template <class T>class...
使用`vector::push_back()`和`struct`的方法如下: 1. 首先,`vector`是C++标准库中的容器,用于存储动态大小的元素序列。`push_back()`是`vecto...
are stored contiguously, which means that elements can be accessed not only through iterators, but also using offsets to regular pointers to elements. This means that a pointer to an element of a vector may be passed to any function that expects a pointer to an element of an array. ...
{ heapArray = new int[1]; heapArray[0] = flag; } }; class Heap { public: Heap(); Heap(std::vector<int> vals, enum HEAP_TYPE flag=MIN); ~Heap(); //1 入队,即插入1个值,O(logN) void enqueue(int val); //2 出队,即删除堆顶,并重新调整堆,O(logN) int dequeue(); //3 ...
vector−deque−array(C++11) list−forward_list(C++11) map−multimap−set−multiset unordered_map(C++11) unordered_multimap(C++11) unordered_set(C++11) unordered_multiset(C++11) Container adaptors span(C++20)−mdspan(C++23) Iterators library ...
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<cpp |container |vector Returns a pointer to the underlying array serving as element storage. The pointer is such that range[data(),data()+size())is always avalid range, even if the container is empty (data()is not dereferenceable in that case). ...
vector<string>importantUsers;...stringlocalUser;...// compute local userallUsers.push_back(std::move(localUser)); 关于移动语义,还有许多细节我们没有提到:比如,&&符号在其它情形下的使用等等。另外,需要注意的是位于栈上的内存不能被移动操作复用,也就是说如果一个类只包含编译器自动维护作用域的变量(类...