Announcements

This unit deals with branching in procedures. Depending on the outcome of a logical condition we may want our program to follow one of two paths and in some cases one of several paths. This is accomplished by the use of if statements and switch statements. In addition, in this unit, we will learn how to read from user supplied data files and how to create such files, and we will discuss the mathematical library functions available in C++ and the methods of their usage.

Reading Assignments

Mandatory:  Book 1 Pages 116 - 119 & 71- 105 

 Subtopics — Notes/ Examples:

• Reading data files and creating report files
• Logical Conditions - Relational and Equality Operators
• if statements
• if - else statements, multiple alternative structures ( if - elseif - elseif - …), and nested if statements
• switch statements
• Mathematical Library Functions

 Tasks:

• Write and execute a program which prompts for and reads the radius of the base and the height of a circular cylinder , calculates and prints to the screen the volume and total surface area of the cylinder ( no need to submit this work).
• Write and execute a program which prompts for and reads 3 numbers a,b,c and prints to the screen only the positive ones ( no need to submit this work).
• Write and execute a program which prompts for and reads a number x, calculates y according to the rule y = 4/3 x for positive x, and y = -0.5 x for negative x. It prints out to the screen x and y with labels, and in addition prints the result to a file called valuespos.txt if x>0 but to a file valuesneg.txt if x <0. ( no need to submit this work). The answer
• Start working on HW2 and 2PA

Jacob Y. Kazakia © 2001 All rights reserved