Question

(1) What are the advantages and disadvantages to using the int data type rather than the bool data type to manipulate Boolean expressions? Why do students think the int data type is still used for Boolean expressions?

(2) Discuss how C++ provides two-way selection through the if…else statement. Explain the syntax of this statement. Also, explain how the bool data type is used in C++ to manipulate Boolean expressions.

Answer 1

Answer 1

   The data type int is used over boolean

       1)   It results boolean true for a non-zero integer value.
       2)   It results boolean false for a zero integer value.

   Advantages
       1)   The counting can be operated along with boolean execution

           For example -

               int count = 10;
               if (count)
                   cout << count;
               else
                   cout << "zero";

           Gives the number as a result, and when it is zero it prints zero.

       2)   Arithmetic operation too can be performed over int.

Answer 2

   A two-way selection is -

       if (true)
       then
           //   do something
       else
           //   do something else

   Here, two choices are available to the user, whether it will be true or false.
   For every choice, there is a selection