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<map> 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<< iter->first <<endl; m.erase...
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...
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...
I can think of three ways that are all slightly different a=[1,2,3,4,5]; If you want to get rid of all cases where |a| is exactly equal to 3 b = a(a~=3); If you want to delete the third element b = a; b(3) = []; or on a single line b = a([1:2, 4:end])...
template<typename ElemType>boolStaticList<ElemType>::Delete(ElemType& v,intindex) {if(Empty()) { std::cout<<"Can't delete element in an empty list!\n";returnfalse; }if(index <1|| index>Length) { std::cout<<"The invalid index!\n";returnfalse; ...
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(); ...
class Vector { private: int element_cout=0; int capacity=0; int* data=nullptr; }; 第一次push_back开辟10个元素的空间 3 添加元素到容器里 使用push_back(i)来把元素放到容器里的过程如下 添加整数11到容器中: 添加整数11到容器中 添加整数12到容器中: 添加整数12到容器中 一直添加,直到添加20到容...
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 ...
How do I delete the 4th element? 1 2 3 4 5 vec.erase(vec.begin() +4); or vec.erase(vec.begin() +3); I've seen this code: 1 2 3 4 5 // erase the 6th elementmyvector.erase (myvector.begin()+5);// erase the first 3 elements:myvector.erase (myvector.begin(),myvector...
从std::vector中删除多个对象？这是我的问题，假设我有一个带有整数的std::vector。将矢量的当前最后一...