C++ How to Program (10th Edition)
10th Edition
ISBN: 9780134448237
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
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Chapter 4, Problem 4.26E
(Square of Asterisks) Write a
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(Area of a convex polygon) A polygon is convex if it contains any line segment that connects two points of the polygon. Write a program that prompts the user to enter the number of points in a convex polygon, then enter the points clockwise, and display the area of the polygon. Sample Run
Enter the number of points: 7
Enter the coordinates of the points:
-12 0 -8.5 10 0 11.4 5.5 7.8 6 -5.5 0 -7 -3.5 -5.5
The total area is 244.575
(Sum the digits in an integer) Write a program that reads an integer between 0 and 1000 and adds all the digits in the integer. For example, if an integer is 932, the sum of all its digits is 14.
(Geometry: distance of two points)
Write a program that prompts the user to enter two points (x1, y1) and (x2, y2) and displays their distance between them.
The formula for computing the distance is:
Square root of ((x2 - x1) squared + (y2 - y1) squared)
Note that you can use pow(a, 0.5) to compute square root of a.
Sample Run
Enter x1 and y1: 1.5 -3.4
Enter x2 and y2: 4 5
The distance between the two points is 8.764131445842194
Chapter 4 Solutions
C++ How to Program (10th Edition)
Ch. 4 - (Correct the Code Errors) Identity and correct the...Ch. 4 - (What Does this Program Do?) What does the...Ch. 4 - For Exercises 4.13—4.16, perform each of these...Ch. 4 - For Exercises 4.13—4.16, perform each of these...Ch. 4 - For Exercises 4.13—4.16, perform each of these...Ch. 4 - For Exercises 4.13—4.16, perform each of these...Ch. 4 - (Find the largest) The process of finding the...Ch. 4 - (Tabular Output) Write a C++ program that uses a...Ch. 4 - (Find the Two Largest Numbers) Using an approach...Ch. 4 - (Validating User Input) The examination-results...
Ch. 4 - (What Does this Program Do?) What does the...Ch. 4 - (What Does this Program Do?) What does the...Ch. 4 - (Dangling-else Problem)C++ compliers always...Ch. 4 - (Another Dangling-else Problem) Based on the...Ch. 4 - (Another Dangling-else Problem) Based on the...Ch. 4 - (Square of Asterisks) Write a program that reads...Ch. 4 - (Palindromes) A palindrome is a number or a text...Ch. 4 - (Printing the Decimal Equivalent of a Binary...Ch. 4 - (Checkerboard Pattern of Asterisks) W rite a...Ch. 4 - (Multiples of 2 with an Infinite Loop) write a...Ch. 4 - (Calculating a Circle’s Diameter, circumference...Ch. 4 - What’s wrong with the following statement? Provide...Ch. 4 - (Sides of a Triangle) Write a program that reads...Ch. 4 - (Sides of a Right Triangle) Write a program that...Ch. 4 - (Factorial) The factorial of a nonnegative integer...Ch. 4 - (Modified Account Class) Modify class Account...Ch. 4 - (Enforcing Privacy with Cryptography) The...Ch. 4 - (World Population Growth) World population has...
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