A vector of integer numbers has been declared in the code. The vector contains 8 elements at the time of declaration. The size() function has been used the first time to count the total elements of the vector and print the count value. The size() function has been used a second time ...
int y, int z) { x_ = x; y_ = y; z_ = z; } int x_; int y_; int z_; }; void time_report(const std::function<void()> &f1, const std::function<void()> &f2) { auto start = std::chrono::high_resolution
insert(const_iterator pos, int count,ele);//迭代器指向位置pos插入count个元素ele erase(const_iterator pos); //删除迭代器指向的元素 erase(const_iterator start, const_iterator end);//删除迭代器从start到end之间的元素 clear(); //删除容器中所有元素 项目对应的CMakeLists如下: ...
max_size()中F11 当前传递_Ty的大小是4个字节(int类型),-1是32bit整数的最大值,二进制表示就是32个1,转成成十进制就是40几个亿,所以_Count 最多容纳10多亿个数据 F10,直到返回 eg:P73\02.cpp #include <vector> #include <iostrem> using namespace std; int main(void) { //vector<int> 是一个...
The default value, 6.5 has been inserted into the vector by creating 2 rows and 3 columns. Thesize()function has been used to count the total rows and columns for printing the values of the vector. //Include necessary libraries #include <iostream> ...
is_trivially_copyable:调用[std::memmove]迁移数据(https://en.cppreference.com/w/cpp/string/byte/memmove),std::vector没有这个逻辑。 否则,循环迁移元素。 std::vector迁移元素时,会根据是否有noexcept move constructor来决定调用move constructor还是copy constructor(之前这篇文章提到过:c++ 从vector扩容看noexce...
List封装了链表,Vector封装了数组, list和vector得最主要的区别在于vector使用连续内存存储的,他支持[]运算符,而list是以链表形式实现的,不支持[]。 Vector对于随机访问的速度很快,但是对于插入尤其是在头部插入元素速度很慢,在尾部插入速度很快。List对于随机访问速度慢得多,因为可能要遍历整个链表才能做到,但是对于插入...
// CPP program to illustrate// Application ofemplace_backfunction#include<iostream>#include<vector>usingnamespacestd;intmain(){intcount =0;vector<int> myvector; myvector.emplace_back(1); myvector.emplace_back(2); myvector.emplace_back(3); ...
如果gdb已经启动,则可以source ~/.gdbinit...::vector -- via pvector command # std::list -- via plist command # std::map -- via pmap..._M_start end end document pvector Prints std::vector information...capacity and ref-count of wstring s end # # C++ related beautifiers #...
StringUtil.cpp 1#include"StringUtil.h"2#include <ctype.h>34usingnamespacestd;56namespacestringutil7{89voiderasePunct(string&s)10{11string::iterator it =s.begin();12while(it !=s.end())13{14if(ispunct(*it))15it =s.erase(it);16else17++it;18}19}20voidstringToLower(string&s)21{22...