Chapter 4

Making Decisions

Exercises

1.

Type in and run the twelve programs presented in this chapter.

• Program 5.1
• Program 5.2
• Program 5.3
• Program 5.4
• Program 5.5
• Program 5.6
• Program 5.7
• Program 5.8
• Program 5.8.a
• Program 5.9
• Program 5.10
• Program 5.10.a

2.

Write a program that takes two numbers from user input and tells the user whether if the first is evenly divisible by the second.

• Exercise 5.2

3.

Write a program that takes in two integers and displays the results of dividing the first by the second, to three-decimal-place accuracy.

• Exercise 5.3

4.

Write a program that acts as a simple "printing" calculator. The program should allow the user to type in expressions of the form:

number  operator

The following operators should be recognized by the program:

+  -  *  /  S  E

S sets the accumulator to the entered number. E tells the program to end execution.

• Exercise 5.4

5.

Program 4.9 reverses the digits of an integer. Modify it so it works correctly with negative numbers.

• Exercise 5.6

6.

Program 5.10 has several inefficiencies. The program should not check for even numbers; it also shouldn't continue to check divisors if the current number is already shown to be divisible by a smaller number. Fix these inefficiences in the program.

• Exercise 5.7