vector<int> num; for(inti=0; i<10; ++i)num.push_back(i); num.push_back(10); num.push_back(10); cout <<"Original array:\n"; //vector<int>::iterator it; //C++11之前用的,11之后可以用auto for(autoit=num.begin(); it!=num.end(); ++it) { cout << *it <<" "; } cout...
ForwardIt remove_if(ExecutionPolicy&&policy, ForwardIt first, ForwardIt last, UnaryPred p); (4)(C++17 起) 从范围[first,last)移除所有满足特定判别标准的元素,并返回范围新结尾的尾后迭代器。 1)移除所有等于(用operator==比较)value的元素。
在标头 <experimental/vector> 定义 template< class T, class Alloc, class Pred > void erase_if( std::vector<T, Alloc>& c, Pred pred ); (库基础 TS v2) 从容器擦除所有满足谓词 pred 的元素。等价于 c.erase(std::remove_if(c.begin(), c.end(), pred), c.end());。
void removeDup2(vector<int> &l) { for(vector<int>::iterator iter1=l.begin(); iter1!=l.end(); iter1++) { for(vector<int>::iterator iter2=iter1+1; iter2!=l.end(); ) { cout<<*iter1<<" "<<*iter2<<endl; if(*iter1==*iter2) { l.erase(iter2); } else iter2++; /...
remove和erase可以实现真正的删除。 vector<int> v; v.push_back( 1 ); v.push_back( 2 ); v.push_back( 3 ); v.push_back( 99 ); v.push_back( 5 ); v.push_back( 99 ); v.push_back( 7 ); v.push_back( 8 ); v.push_back( 9 ); ...
constexpr typename std::vector<T, Alloc>::size_type erase_if( std::vector<T, Alloc>& c, Pred pred ); (2) (since C++20)1) Erases all elements that compare equal to value from the container c. Equivalent to auto it = std::remove(c.begin(), c.end(), value);auto r = c.en...
if(条件1) {主体1;}else if(条件2) {主体2;}else{主体3;} switch cpp switch(选择句) {//选择句必须是一个整型表达式case标签1: {//标签必须是整型常量主体1;break;//break 语句进行中断,否则将会往下执行}case标签2: {主体2;break;}defaulf: {主体3;}} ...
6.2.1 std::vector动态数组 6.2.1.1 为什么有Vector,C++ 中的 vector 是一种序列容器,它允许你在运行时动态地插入和删除元素。基于数组的数据结构,但它可以自动管理内存 6.2.1.2 Vector基础函数,添加元素,访问元素,获取大小,迭代访问,删除元素,清空 Vector ...
voiderase_if(std::vector<T, Alloc>&c, Pred pred); (library fundamentals TS v2) Erases all elements that satisfy the predicatepredfrom the container. Equivalent toc.erase(std::remove_if(c.begin(), c.end(), pred), c.end());.
svr.Get("/stream", [&](const Request &req, Response &res) { res.set_content_provider( "text/plain", // Content type [&](size_t offset, DataSink &sink) { if (/* there is still data */) { std::vector<char> data; // prepare data... sink.write(data.data(), data.size()...