swap(m2); std::cout << "──────── swap 之后 ────────\n" << "m1:" << m1 << "m2:" << m2 << "引用:" << ref << "\n迭代器:" << *iter << '\n'; // 注意交换前指代一个容器中的元素的每个迭代器在交换后都指代同一元素。对于引用也是这样。 } 可能的输出:...
' << i; return os << " }\n"; } int main() { std::unordered_map<std::string, std::string> m1{{"γ", "gamma"}, {"β", "beta"}, {"α", "alpha"}, {"γ", "gamma"}}, m2{{"ε", "epsilon"}, {"δ", "delta"}, {"ε", "epsilon"}}; const auto& ref = *(m...
问声明中出现std::unordered_map错误ENvs低版本转高版本，std::getline报错，如下 提示 error C...
__cpp_lib_constexpr_containers202502L(C++26)constexprstd::unordered_map Example Run this code #include <iostream>#include <string>#include <unordered_map>intmain(){// Create an unordered_map of three strings (that map to strings)std::unordered_map<std::string,std::string>u={{"RED","#...
From cppreference.com std::unordered_map Member types Member functions unordered_map::unordered_map unordered_map::~unordered_map unordered_map::operator= unordered_map::get_allocator Iterators unordered_map::beginunordered_map::cbegin unordered_map::endunordered_map::cend ...