int *build_array(int n)
{
    int *new_array,i,num;

    new_array = (int*)malloc(n*sizeof(int));

        if (new_array == NULL)
        {
            printf("Memory faild\n");
            exit(1);
        }
        for (i = 0;i < n; i++)
        {
            printf("Enter number between -30 to 30\n");
            scanf("%d",&num);
            while (!((num <= 30) && (num >= -30)))
            {
                printf("The number you entered is not in the designated limits\nplease enter again:\n");
                scanf("%d",&num);
            }
            new_array[i]=num;
        }

        return new_array;

}