Check number is Positive, Negative or Zero using C program

/*  C program to check whether number is 
    POSITIVE, NEGATIVE or ZERO until user doesn’t want to exit.*/

#include <stdio.h>

int main()
{
    int num;
    char choice;
    do {
        printf("Enter an integer number :");
        scanf("%d", &num);

        if (num == 0)
            printf("Number is ZERO.");
        else if (num > 0)
            printf("Number is POSITIVE.");
        else
            printf("Number is NEGATIVE.");

        printf("\n\nWant to check again (press Y/y for 'yes') :");
        fflush(stdin); /*to clear input buffer*/
        scanf(" %c", &choice); /*Here is a space before %c*/
    } while (choice == 'Y' || choice == 'y');

    printf("\nBye Bye!!!");

    return 0;
}

    Enter an integer number :0
    Number is ZERO.

    Want to check again (press Y/y for 'yes') :Y
    Enter an integer number :1234
    Number is POSITIVE.

    Want to check again (press Y/y for 'yes') :Y
    Enter an integer number :-345
    Number is NEGATIVE.

    Want to check again (press Y/y for 'yes') :y
    Enter an integer number :45
    Number is POSITIVE.

    Want to check again (press Y/y for 'yes') :N

    Bye Bye!!!