erase会使得以前那个未被加一的it失效,而加了一之后的新的it是有效的。 2. find delete element(找到指定的元素删除) #include intmain() { map<string,int>m; m["a"]=1; m["b"]=2; m["c"]=3; map<string,int>::iterator iter; iter= m.find("a");if(iter!=m.end())//找到了{ cout<...
publicclassVectorExample{publicstaticvoidmain(String[]args){Vector<String>vector=newVector<>();vector.add("Element1");vector.add("Element2");StringelementToDelete="Element1";if(vector.contains(elementToDelete)){vector.remove(elementToDelete);}else{System.out.println("元素不存在");}}} 1. 2...
(An iterator pointing to the new location of the element that followed the last element erased by the function call. This is the container end if the operation erased the last element in the sequence.) 2.代码实例 1#include<iostream>2#include<string>3#include<vector>4usingnamespacestd;56int...
return (int)element->size(); } //返回索引为theIndex的元素 T& get(int theIndex) const; //返回元素theElement的索引 int indexOf(const T &theElement) const; //删除索引为theIndex的元素 void erase(int theIndex); //在索引为theIndex的位置插入元素theElement void insert(int theIndex, const T...
std::cout << "Second element: " << numbers[1] << '\n'; numbers[0] = 5; std::cout << "All numbers:"; for (auto i : numbers) { std::cout << ' ' << i; } std::cout << '\n'; } front 用于访问第一个元素 reference front(); ...
deleteCount:uint(default =4294967295)— An integer that specifies the number of elements to be deleted. This number includes the element specified in thestartIndexparameter. If you do not specify a value for thedeleteCountparameter, the method deletes all of the values from thestartIndexelement ...
vector类使用默认的分配器进行new和delete的内存操作. 在x86平台上, new操作符分配的内存是8字节对齐的. 如果想自定义内存分配, 那就需要重写分配器以支持16字节的内存对齐. 这意味着内存分配器使用的new和delete操作符必须替换成_mm_malloc和_mm_free指令. 下面是vector对齐分配器的完整代码: 代码语言:javascript ...
erase(it); } else { ++it; } } print_container(c); } void TzVectorInsertAndDeleteCase04() { std::vector<std::string> letters; letters.push_back("abc"); std::string s = "def"; letters.push_back(std::move(s)); std::cout << "vector holds: "; for (auto&& i : letters) ...
insert Inserts an element or many elements into the vector at a specified position. max_size Returns the maximum length of the vector. pop_back Deletes the element at the end of the vector. push_back Add an element to the end of the vector. rbegin Returns an iterator to the first eleme...
for (int cEachItem = 0; cEachItem < ARRAY_SIZE; cEachItem++) theVector.push_back(cEachItem); // Output the contents of the dynamic vector of integers. ShowVector(theVector); // Using void iterator erase(iterator Iterator) to // delete the 6th element (Index starts with 0)....