In function 'int main()': 13:13: error: assignment of read-only location 'it.__gnu_cxx::__normal_iterator<_Iterator, _Container>::operator*<const int*, std::vector<int> >()' 反向迭代器:定义方式为:容器名::reverse_iterator。使用反向迭代器可以反向遍历容器,如代码所示: 代码语言:javascript...
Clients use thefirst(),isDone(),next(), andcurrentItem()protocol #include <iostream>usingnamespacestd;classStack{intitems[10];intsp;public:friendclassStackIter;Stack() {sp=-1; }voidpush(intin) {items[++sp]=in; }intpop() {returnitems[sp--]; }boolisEmpty() {return(sp==-1); }Sta...
Great article, I was having some trouble with this in cpp17 where I wasn't before upgrading my code.This article helped me solve it. imallett on November 18, 2021 at 18:31 Minor suggestions: in the source code, there's trailing whitespace on some lines, and trailing semicolons on th...
template<typename _InputIterator>inlinetypename iterator_traits<_InputIterator>::difference_typedistance(_InputIterator __first, _InputIterator __last){// concept requirements -- taken care of in __distancereturnstd::__distance(__first, __last,std::__iterator_category(__first)); }// 遍历迭代...
↑LegacyContiguousIteratorcategory was only formally specified in C++17, but the iterators ofstd::vector,std::basic_string,std::array, andstd::valarray, as well as pointers into C arrays are often treated as a separate category in pre-C++17 code. ...
// iterator_op_insert.cpp// compile with: /EHsc#include<iterator>#include<vector>#include<iostream>intmain(){usingnamespacestd;vector<int> vec;for(inti =0; i <6; ++i) { vec.push_back(2* i); }cout<<"The initial vector vec is: ( ";for(vector<int>::iterator vIter = vec.begin...
// back_insert_iterator_back_insert.cpp// compile with: /EHsc#include<iterator>#include<vector>#include<iostream>intmain( ){usingnamespacestd;inti;vector<int> vec;for(i =1; i <4; ++i ) { vec.push_back ( i ); }vector<int>::iterator vIter;cout<<"The vector vec is: ( ";for(...
Defined in header <filesystem> class recursive_directory_iterator; (since C++17) recursive_directory_iterator是InputIterator,则遍历directory_entry目录的元素,并且递归地遍历所有子目录的条目。迭代顺序未指定,只是每个目录条目只访问一次。
// istreambuf_iterator_char_type.cpp // compile with: /EHsc #include <iterator> #include <vector> #include <iostream> #include <algorithm> int main( ) { using namespace std; typedef istreambuf_iterator<char>::char_type CHT1; typedef istreambuf_iterator<char>::traits_type CHTR1; cout...
// istream_iterator_istream_iterator.cpp // compile with: /EHsc #include <iterator> #include <vector> #include <algorithm> #include <iostream> int main( ) { using namespace std; // Used in conjunction with copy algorithm // to put elements into a vector read from cin vector<int> vec...