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)...