What is the c++ universal header file?

c The universal header file is: "#include". The header file is a carrier file that contains functional functions and data interface declarations; it is mainly used to save the declaration of the program, while the definition file is used to save the implementation of the program.

In C language family programs, header files are widely used. Generally speaking, each C/C program usually consists of header files and definition files. As a carrier file containing declarations of functional functions and data interfaces, the header file is mainly used to save the declaration of the program, while the definition file is used to save the implementation of the program.

c The universal header file is:

#include<bits/stdc++.h>

In fact, it includes:

(basically includes most of STL Library functions, easy and fast to use)

#include <iostream>
#include <cstdio>
#include <fstream>
#include <algorithm>
#include <cmath>
#include <deque>//
#include <vector>//向量
#include <queue>//队列
#include <string>
#include <cstring>      
#include <map>//
#include <stack>//栈
#include <set>//

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C Language"

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