Write a c program to convert decimal number into binary number

#include<stdio.h>

#include<conio.h>

void main()

{

int n,r,i=1,dnum;

long bin=0;

clrscr();

printf("Enter a decimal number: ");

scanf("%d",&n);

dnum=n;

while(n!=0)

{

r=n%2;

n=n/2;

bin=bin+r*i;

i=i*10;

}

printf("%d=%d",dnum,bin);

getch();

}

Output:

Enter a decimal number: 15

15=1111