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Integer to Binary in c

Objective : To convert the given integer to binary in C language.

Programming technique : The conversion of integer to binary can be done in many ways. I will demonstrate a very simple (possibly very unoptimised ) way which it is easy to understand.
This way involves using an array to store the remainder of the number when we divide it by 2. The remainder will be saved in array. We will start filling the array from the last and at last we will print the array.
This technique will convert integer number to binary using array, it may not be a true solution but you will get the picture.
we will use % modules operator to extract remainder. Then will reduce the number till it reaches 0. The array will be initialized to 0.

Code : 
#include<stdio.h>
int main()
{
    int p;
    printf("\n Enter a number=");
    scanf("%d",&p);
    bin(p);
}

void bin(int x)
{
    long b=0;
    int binary[20],i;
    for(i=0;i<20;i++)
    {
        binary[i]=0;//setting array to 0
    }
    i=19;// starting from last of array
    while(x>0)
    {

        binary[i]=x%2;//save remainder to array
        x=x/2; //reduce number
        i--;//moving index 
    }
    printf("\n Printing Binary=");
    for(i=0;i<20;i++)
    {
        printf("%d",binary[i]);
    }
}


one possible drawback of this technique is that you cant use the binary number directly  in calculations.
Note : The above method will store only 20 digits of binary.
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