typename std::deque<T, Alloc>::size_type erase_if( std::deque<T, Alloc>& c, Pred pred ); (2) (C++20 起) (C++26 起为 constexpr) 1) 从容器 c 中擦除所有比较等于 value 的元素。等价于 auto it = std::remove(c.begin(), c.end(), value);auto r = c.end() - it;c.erase...
" << erased << '\n'; std::deque<std::complex<double>> nums{{2, 2}, {4, 2}, {4, 8}, {4, 2}}; #ifdef __cpp_lib_algorithm_default_value_type std::erase(nums, {4, 2}); #else std::erase(nums, std::complex<double>{4, 2}); #endif println("After erase {4, 2},...
#include <deque> #include <iostream> void print(auto rem, const std::deque<int>& c) { for (std::cout << rem; const int el : c) std::cout << el << ' '; std::cout << '\n'; } int main() { std::deque<int> c = {1, 2, 3}; print("deque 持有:", c); c.resize...
std::deque<T,Allocator>::deque From cppreference.com <cpp |container |deque deque(); (1) explicitdeque(constAllocator&alloc); (2) (3) explicitdeque(size_type count, constT&value=T(), constAllocator&alloc=Allocator()); (until C++11) ...
The following code uses size to display the number of elements in a std::deque: Run this code #include <deque> #include <iostream> int main() { std::deque<int> nums{1, 3, 5, 7}; std::cout << "nums contains " << nums.size() << " elements.\n"; } Output: nums contains...
>deque 可以常数时间下标访问,但是内存不连续 >priority_queue 可以了解如何修改或自定义比较函数,例如priority_queue<T, vector<T>, greater<T>> >unordered_map 可以学习哈希表相关知识 >array 可以当作部分 pair 和 tuple 的替用品,或者替代原生数组
External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index C reference C89,C95,C99,C11,C17,C23│Compiler supportC99,C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support ...
External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index C reference C89,C95,C99,C11,C17,C23│Compiler supportC99,C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support ...
External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index C reference C89,C95,C99,C11,C17,C23│Compiler supportC99,C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support ...
External Links−Non-ANSI/ISO Libraries−Index−std Symbol Index C reference C89,C95,C99,C11,C17,C23│Compiler supportC99,C23 Language Basic concepts Keywords Preprocessor Expressions Declaration Initialization Functions Statements Headers Type support ...