vector<int> demo{1, 2}; // 如果参数为const vector<int> 需要用const_iterator // vector<int>::const_iterator iter=v.begin(); for (vector<int>::iterator it = demo.begin(); it != demo.end(); ++it) { cout << (*it) << " ";
vector类型总是包括vector的元素类型: vector<int>::size_type //ok vector::size_type //error 向vector添加元素 push_back()操作接受一个元素值,并将它作为一个新的元素添加到vector对象的后面,也就是“插入(push)”到vector对象的“后面(back)”: // read words from the standard input and store them ...
/** 直接用迭代器,注意const_iterator还是iterator* */void search2() {vector<int> demo{1, 2};// 如果参数为const vector<int> 需要用const_iterator// vector<int>::const_iterator iter=v.begin();for (vector<int>::iterator it = demo.begin(); it != demo.end(); ++it) {cout << (*it...
1、需求:得到 某个 iterator在 vector中是第几个(即 获取序号) 2、测试代码:(Win7x64,vs08x86) #include <stdio.h>#include<stdlib.h>#include<windows.h>#include<io.h>#include#include<math.h>#include<list>#include<string>#include<sstream>#include<algorithm>//std::find(...)#include <vector...
std::vector<A*> vec; vec.reserve(3); vec.push_back(a); vec.push_back(b); vec.push_back(c); std::vector<A*>::iterator iter = vec.begin(); for(; iter!=vec.end(); ++iter) { delete*iter;//*iter = a , b, c }
vector<bool> space-efficient dynamic bitset (class template specialization) Iterator invalidation OperationsInvalidated All read only operationsNever. swap,std::swapend() clear,operator=,assignAlways. reserve,shrink_to_fitIf the vector changed capacity, all of them. If not, none. ...
std::vector<int> v = {1, 2, 3, 4, 5}; for (auto x : v) { std::cout << x << " "; } } 自定义的类型,满足range概念,都可以使用范围的特性。即它可以用begin()和end()函数来获取其起始和终止位置。这两个函数返回的对象必须是迭代器或者哨兵。迭代器是...
vector<bool> space-efficient dynamic bitset (class template specialization) Iterator invalidation OperationsInvalidated All read only operationsNever. swap,std::swapend() clear,operator=,assignAlways. reserve,shrink_to_fitIf the vector changed capacity, all of them. If not, none. ...
std::regex express(pattern); //匹配 std::cout.setf(std::ios_base::boolalpha); /*模板函数1-1*/ //第0组一般是整个正则表达式匹配结果, 其他依次是捕获组的结果 //这里使用的是 std::string::iterator 迭代器, 与 begin()/ end() 返回的迭代器类型(std::string::iterator)要一致 ...
std::vector<T,Allocator>:: C++ 容器库 std::vector (1) iterator erase(iterator pos); (C++11 前) iterator erase(const_iterator pos); (C++11 起) (C++20 起为constexpr) (2) iterator erase(iterator first, iterator last); (C++11 前)...