且看remove_if的源代码(摘自cpp官网): template<classForwardIterator,classUnaryPredicate>ForwardIteratorremove_if(ForwardIterator first, ForwardIterator last, UnaryPredicate pred){ ForwardIterator result = first;while(f
代码语言:cpp 复制 #include<iostream>#include<vector>#include<algorithm>boolis_odd(intn){returnn%2!=0;}intmain(){std::vector<int>v={1,2,3,4,5,6,7,8,9};// 使用remove_if删除满足条件的元素autonew_end=std::remove_if(v.begin(),v.end(),is_odd);// 将"removed"元素设置为...
// CPP program to illustrate// Application of remove_if() function#include<iostream>#include<list>usingnamespacestd;// Predicate implemented as a functionboolprime(constint& value){inti;for(i =2; i < value; i++) {if(value % i ==0) {returnfalse; ;break; } }if(value == i) {ret...
代码语言:cpp 复制 #include<iostream>#include<vector>#include<algorithm>structPerson{std::string name;intage;};boolisAdult(constPerson&person){returnperson.age>=18;}intmain(){std::vector<Person>people={{"Alice",20},{"Bob",15},{"Charlie",25},{"David",30}};// 使用find_if函数查找年龄大...
nOver\tA\vLazy\tFox\r\n";str2.erase(std::remove_if(str2.begin(), str2.end(),[](unsignedcharx){returnstd::isspace(x);}), str2.end());std::cout<<"5) "<<std::quoted(str2)<<'\n';std::vector<std::complex<double>>nums{{2,2},{1,3},{4,8}};#ifdef __cpp_lib_...
// alg_remove_if.cpp // compile with: /EHsc #include <vector> #include <algorithm> #include <iostream> bool greater6 ( int value ) { return value >6; } int main( ) { using namespace std; vector <int> v1, v2; vector <int>::iterator Iter1, Iter2, new_end; int i; for (...
remove_if 演算法從範圍(First, Last)來移除所有項目該原因讓述詞傳回 true。它會傳回 Iterator 等於 Last -n,其中的是中的元素 n =數字移除。這個範圍中的最後一個項目具有 n 有效,但未指定的值。容器的大小會維持不變。 範例 c++ 複製 // remove_if.cpp // compile with: /EHsc // Illustrates ho...
remove_if 原理类似于remove,区别在于前者是通过判别p返回值来删除元素的,后者是通过判断是否与value相等。 remove示例: “虚假删除”vec中所有值与3相等的元素(容器尺寸不变): vector<int>vec({1,2,3,3,9,10,3,4,5,8});autoit =remove(vec.begin(), vec.end(),3);// vec为"1 2 9 10 4 5 8...
template<class Predicate> void remove_if( Predicate _Pred ) 参数 _Pred 一元谓词如果由一个元素满足,将会从列表中删除该元素。 示例 复制 // list_remove_if.cpp // compile with: /EHsc #include <list> #include <iostream> template <class T> class is_odd : public std::unary_function<T, ...
voidremove_if(UnaryPred p); (until C++20) template<classUnaryPred> size_type remove_if(UnaryPred p); (since C++20) (constexpr since C++26) Removes all elements satisfying specific criteria. 1)Removes all elements that are equal tovalue(usingoperator==). ...