How to make one header file of our own in program which includes all header files of c?

Question

Write your own rand function which returns random numbers in a given range(input) so that the numbers in the given range is equally likely to appear.

Answer 1

Create myownheader.h file and include all other file like,

#include<stdio.h>    
#include<conio.h>    
#include<math.h>    
#include<stdlib.h>    
#include<string.h>    
#include<time.h>    
#include<ctype.h>    
#include<malloc.h>

and when you need any header file in .c file, add only myownheader.h. For example:

#include "myownheader.h"

int main()
{
// my code
}