How does include bits stdc h work in C duplicate

Question

According to a codeforces blog, if we include #include bits/stdc++.h> in a C++ application, there is no need to include any additional header files.

Is it OK to use #include bits/stdc++.h> instead of include separate header files?

Answer 1

#include <bits/stdc++.h> is a precompiled header implementation file.

Minimizing the inclusion is a smart approach from the standpoint of software engineering.

If you use bits/stdc++.h>, it includes a number of files that your programme may not need, increasing both compilation time and programme size needlessly.

However, in competitions, employing this file is a smart idea if you want to minimise the time spent on tasks, especially if your rank is time-sensitive.

It is compatible with the majority of online judges and programming contest venues, including ACM-ICPC (Sub-Regionals, Regionals, and World Finals) and many more online judges.

Its downsides are as follows:

1. lengthens the compiling time

2. Because it makes use of a non-standard internal header file of the GNU C++ library, it will not build with MSVC, XCode, or many other compilers.