Problem Solving with C++ plus MyProgrammingLab with Pearson eText-- Access Card Package (9th Edition)
Problem Solving with C++ plus MyProgrammingLab with Pearson eText-- Access Card Package (9th Edition)
9th Edition
ISBN: 9780133862218
Author: Walter Savitch
Publisher: PEARSON
Question
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Chapter 2.1, Problem 7STE
Program Plan Intro

Defining good variable name:

  • In every programming, variable names and other names should at least hint at the meaning or use of thing they are naming.
  • It is very useful to understand a program if the variables contains the meaningful names.

Rules for naming variable:

  • Variable name cannot be a C++ keyboard. Example “int”, “double” cannot be a variable name because of, it is the keyword of C++.
  • Variable name must begin with an alphabet that is upper case (“A” to “Z”) or lowercase (“a” to “z”).
  • Variable name can contain an underscore (_) but can’t contain the other characters such as “!”, “@”, “&” etc.
  • The name of the variable can be of any length however only first 31 characters are important.
  • Variable name contains the combination of upper and lowercase letters.

Example:

The example for proper and improper usage of variable names is given below:

Proper usage of variable names: “mark”, “highestRank”, “first_place” etc.

Improper usage of variable names: “12mark”, “!high@3”, “*place*” etc.

Explanation of Solution

Variable to hold the pay rate for an hourly employee:

  • The variable name to hold the pay rate for an hourly employee is “payrate”. Based on the description, the given variable needs to be declared in datatype of “double”...

Explanation of Solution

Variable to hold the highest score in an exam:

  • The variable name to hold the highest score in an exam is “highestScore”. Based on the description, the given variable needs to be declared in datatype of “double”...

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Chapter 2 Solutions

Problem Solving with C++ plus MyProgrammingLab with Pearson eText-- Access Card Package (9th Edition)

Ch. 2.2 - Write a complete C++ program that writes the...Ch. 2.2 - Write a complete C++ program that reads in two...Ch. 2.2 - Prob. 13STECh. 2.2 - Write a short program that declares and...Ch. 2.3 - Convert each of the following mathematical...Ch. 2.3 - Prob. 16STECh. 2.3 - What is the output of the following program lines...Ch. 2.3 - Write a complete C++ program that reads two whole...Ch. 2.3 - Given the following fragment that purports to...Ch. 2.3 - What is the output of the following program lines...Ch. 2.4 - Write an if-else statement that outputs the word...Ch. 2.4 - Suppose savings and expenses are variables of type...Ch. 2.4 - Write an if-else statement that outputs the word...Ch. 2.4 - Write an if-else statement that outputs the word...Ch. 2.4 - Consider a quadratic expression, say x2 x 2...Ch. 2.4 - Consider the quadratic expression x2 4x + 3...Ch. 2.4 - What is the output of the following cout...Ch. 2.4 - What is the output produced by the following (when...Ch. 2.4 - What output would be produced in the previous...Ch. 2.4 - What is the output produced by the following (when...Ch. 2.4 - What is the output produced by the following (when...Ch. 2.4 - What is the most important difference between a...Ch. 2.4 - What is the output produced by the following (when...Ch. 2.4 - Write a complete C++ program that outputs the...Ch. 2.5 - The following if-else statement will compile and...Ch. 2.5 - Prob. 36STECh. 2.5 - Write a complete C++ program that asks the user...Ch. 2 - A metric ton is 35,273.92 ounces. Write a program...Ch. 2 - The Babylonian algorithm to compute the square...Ch. 2 - Many treadmills output the speed of the treadmill...Ch. 2 - Write a program that plays the game of Mad Lib....Ch. 2 - The following is a short program that computes the...Ch. 2 - A government research lab has concluded that an...Ch. 2 - Workers at a particular company have won a 7.6%...Ch. 2 - Modify your program from Programming Project 2 so...Ch. 2 - Negotiating a consumer loan is not always...Ch. 2 - Write a program that determines whether a meeting...Ch. 2 - Prob. 6PPCh. 2 - It is difficult to make a budget that spans...Ch. 2 - You have just purchased a stereo system that cost...Ch. 2 - Write a program that reads in ten whole numbers...Ch. 2 - Modify your program from Programming Project 9 so...Ch. 2 - Sound travels through air as a result of...Ch. 2 - Prob. 12PPCh. 2 - The HarrisBenedict equation estimates the number...Ch. 2 - Write a program that calculates the total grade...Ch. 2 - It is important to consider the effect of thermal...
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