void printRational(int n, int d)
{
        printf("\n--------------------------------------------\n");
        reduceResult();
        printf("The current result is: %d/%d\n", n, d);
        printf("1. Subtract a rational number from the current result; \n");
        printf("2. Add a rational number to the current result; \n");
        printf("3. Multiply the current result by a rational number; \n");
        printf("4. Divide the current result by a rational number; \n");
        printf("5. Take the reciprocal of the current result; \n");
        printf("6. Quit\n\n");
        printf("Please enter a selection: ");

}