To find binary equivalent of the decimal number

In this program I have given the concept to convert binary number into decimal number.
For example
the binary equivalent of 10 is 1010
The main source code of this program is given below:

	#include<stdio.h>
	#include<conio.h>
	int main()
	{
	int num,i,base=1,sum=0,rem;
	printf("Enter a number");
	scanf("%d",&num);
	i=num;
	while(num!=0)
	{
	rem=num%2;
	sum=sum+rem*base;
	base=base*10;
	num=num/2;
	}
	printf("the binary equivalent of %d is %d",i,sum);
	getch();
	}

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