About bits/stdc++.h in C++
bits/stdc++.h in C++
On this page we will discuss about the header file bits/stdc++.h which is used in C++. It is a header file that includes a lot of standard C++ libraries in a single file. The header file bits/stdc++.h is usually found in the bits directory of the implementation of the GNU Standard C++ Library (libstdc++).
About bits/stdc++.h in C++
This header file is not part of the C++ standard library, but it is widely used in competitive programming because it saves the time and effort of including individual header files for each library that is needed.
Using bits/stdc++.h may make your code less portable because it includes a lot of implementation-specific header files. It is generally a good idea to include only the specific header files that you need in your code.
Syntax
#include <bits/stdc++.h>
Advantages of bits/stdc++.h
- It saves time and effort by including a lot of standard C++ libraries in a single file.
- It can be especially useful in competitive programming, where time is often a critical factor.
- It can reduce the number of #include statements in your code, which can make your code more concise and easier to read.
Disadvantages of bits/stdc++.h
- It includes a lot of header files that you may not actually need in your code. This can increase the compile time of your code and make your compiled binaries larger.
- It is not part of the C++ standard library, and it may not be available on all systems or compilers.
- It is generally a good idea to avoid using non-standard library extensions in your code to ensure maximum portability.
Implementation of bits/stdc++.h in C++
Example :
The following code shows the use of header file bits/stdc++.h :#include <bits/stdc++.h>
using namespace std;
int main() {
// Use standard library functions and objects
vector< int>v = {1, 2, 3, 4, 5};
sort(v.begin(), v.end());
for (int x : v) {
cout << x << " ";
}
cout << endl;
return 0;
}
Output:
1 2 3 4 5
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