Create a function with the signature:

int gethours$()$;

This function prompts the user to enter a value for hours of usage that is between $0$ and $720,$ inclusive. When a valid value is entered, that value ie returned by the function, otherwise the user is asked to re$-$enter a valid value.

RUN TEST CASES:

a$)$ Valid Case: $700$

b$)$ Invalid Case: $730$