Sample Output:

Enter first number: $5$

Enter second number: $2$

Enter operation $(+,-,***\frac{,}{,{?}^{{?}^{?}}})$ : $^$

The result is: $25$

Continue with new operation $($yes$/$no$)?$ yes

Enter first number: $9\mathrm{.}2$

Enter second number: $0$

Enter operation $(+,-,***\frac{,}{,{?}^{{?}^{?}}})$ : $/$

Error: Division by zero is not allowed.

Continue with new operation $($yes$/$no$)?$ no

Exiting calculator...