4.Write a program to convert a decimal number to its binary equivalent.

// Write a program to convert a decimal number to its binary equivalent.
#include<stdio.h>
int main()
{
    int n = 1000005, ar[50], count = 0;
    while(n != 0)
    {
        ar[count] = n % 2;
        count++;
        n /= 2;
    }
    for (int i = count-1; i >= 0; --i)
    {
        printf("%d", ar[i]);
    }
    return 0;
}