We append to an std::vector<Foo> using push_back and emplace_back, as shown below: int main() { std::vector<Foo> v; /* Reserve space for at least 2 elements to avoid reallocation. */ v.reserve(2); //insert v.push_back(10); //emplace v.emplace_back(20); return 0; } //...
emplace():用于在队列末尾插入新元素。 用法: queue <data_type> q 下面的程序来说明这一点: C++ // C++ program to demonstrate the// working of queue#include<bits/stdc++.h>usingnamespacestd;// Driver Codeintmain(){// Declare a queuequeue<int> q;// Insert elements in the queueq.push(10)...