C program to convert a number to binary format

Below is a small C program to convert a given decimal number to its binary representation. The code is very easy to understand and is commented out for better readability.

/*Program to convert the given number into binary format*/
main()
{
    int num,tnum,bin[16],i,j,quot,rem;
    clrscr();

    /*Reading the decimal number from user*/
    printf("Enter a decimal number:");
    scanf("%d", &num);

    /*Converting decimal number to binary*/
    tnum = num;
    i = 0;
    while(num > 0)
    {
        bin[i] = num % 2;
        num = num / 2;
        i++;
    }

    /*Printing the binary number*/
    printf("Binary representation of %d is: ",tnum);
    for(j=i-1;j>=0;j--)
    printf("%d",bin[j]);
    getch();
}

Sample input and output:
Enter a decimal number:36
Binary representation of 36 is: 100100