Problem Solving with C++ (9th Edition)
9th Edition
ISBN: 9780133591743
Author: Walter Savitch
Publisher: PEARSON
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Textbook Question
Chapter 3, Problem 2PP
(This Project requires that you know some basic facts about complex numbers, so it is only appropriate if you have studied complex numbers in some mathematics class.)
Write a C++
| ax2 + bx + c = 0 |
(where a is not zero) are given by the formula
| (−b ± sqrt(b2 − 4ac)) / 2a |
The value of the discriminant (b2 − 4ac) determines the nature of roots. If the value of the discriminant is zero, then the equation has a single real root. If the value of the discriminant is positive then the equation has two real roots. If the value of the discriminant is negative, then the equation has two complex roots.
The program takes values of a, b, and c as input and outputs the roots. Be creative in how you output complex roots. Include a loop that allows the user to repeat this calculation for new input values until the user says she or he wants to end the program.
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CODE USING C++
We've already tried comparing 3 numbers to see the largest among all, so let's try a more complicated mission where we locate where among the 5-digit integer is the largest one. There are only 4 possible cases for this mission:
if the largest digit is the first digit, print "Leftmost"
if the largest digit is the third digit, print "Middle"
if the largest digit is the last digit, print "Rightmost"
if none of the above is correct, print "Unknown"
Now, show me how far you've understood your lessons!
Input
A line containing a five-digit integer.
14632
Output
A line containing a string.
Middle
C++
One way to create a pseudo-random three digit number (and we are including one- and two-digit numbers as well) is rand()%1000. That gives numbers from 000 to 999, which is just what we want.
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As specified, have the program tell the player how many guesses were used. A good player should always be able to find a three-digit number in ten or fewer guesses.
The programs needs to include a menu that allows the user to select easy (3 digit number),…
Suppose you want to deposit a certain amount of money into a savings account, and thenleave it alone to draw interest for the next 10 years. At the end of 10 years, you would like tohave $10,000 in the account. How much do you need to deposit today to make that happen?You can use the following formula, which is known as the present value formula, to find out:The terms in the formula are as follows: [5 marks]• P is the present value, or the amount that you need to deposit today.• F is the future value that you want in the account. (In this case, F is $10,000.)• r is the annual interest rate.• n is the number of years that you plan to let the money sit in the account.Write a method named presentValue that performs this calculation. The method should accept the future value, annual interest rate, and number of years asarguments. It should return the present value, which is the amount that you need to deposit today.Demonstrate the method in a program that lets the user experiment with…
Chapter 3 Solutions
Problem Solving with C++ (9th Edition)
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