Problem Solving with C++ (10th Edition)
10th Edition
ISBN: 9780134448282
Author: Walter Savitch, Kenrick Mock
Publisher: PEARSON
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Textbook Question
Chapter 4.3, Problem 9STE
Carefully describe the call-by-value parameter
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2. Signed Integers
Unsigned binary numbers work for natural numbers, but many calculations use negative
numbers as well. To deal with this, a number of different methods have been used to represent
signed numbers, but we will focus on two's complement, as it is the standard solution for
representing signed integers.
2.1 Two's complement
• Most significant bit has a negative value, all others are positive. So, the value of an n-digit
-2
two's complement number can be written as: Σ2 2¹ di 2n-1 dn
• Otherwise exactly the same as unsigned integers.
i=0
-
• A neat trick for flipping the sign of a two's complement number: flip all the bits (0 becomes 1,
or 1 becomes 0) and then add 1 to the least significant bit.
• Addition is exactly the same as with an unsigned number.
2.2 Exercises
For questions 1-3, answer each one for the case of a two's complement number and an
unsigned number, indicating if it cannot be answered with a specific representation.
1. (15 pts) What is the largest integer…
can u solve this question
1. Unsigned Integers
If we have an n-digit unsigned numeral dn-1d n-2...do in radix (or base) r, then the value of that
numeral is
n−1
r² di
Σi=0
which is basically saying that instead of a 10's or 100's place we have an r's or
r²'s place. For binary, decimal, and hex r equals 2, 10, and 16, respectively.
Just a reminder that in order to write down a large number, we typically use the IEC or SI
prefixing system:
IEC: Ki = 210, Mi = 220, Gi = 230, Ti = 240, Pi = 250, Ei = 260, Zi = 270, Yi = 280;
SI: K=103, M = 106, G = 109, T = 10¹², P = 1015, E = 10¹8, Z = 1021, Y = 1024.
1.1 Conversions
a. (15 pts) Write the following using IEC prefixes: 213, 223, 251, 272, 226, 244
21323 Ki8 Ki
223 23 Mi 8 Mi
b. (15 pts) Write the following using SI prefixes: 107, 10¹7, 10¹¹, 1022, 1026, 1015
107 10¹ M = 10 M
=
1017102 P = 100 P
c. (10 pts) Write the following with powers of 10: 7 K, 100 E, 21 G
7 K = 7*10³
Chapter 4 Solutions
Problem Solving with C++ (10th Edition)
Ch. 4.2 - Prob. 1STECh. 4.2 - Convert each of the following mathematical...Ch. 4.2 - Write a complete C++ program to compute and output...Ch. 4.2 - Write and compile short programs to test the...Ch. 4.3 - Prob. 5STECh. 4.3 - Prob. 6STECh. 4.3 - Prob. 7STECh. 4.3 - Prob. 8STECh. 4.3 - Carefully describe the call-by-value parameter...Ch. 4.3 - Prob. 10STE
Ch. 4.3 - Write a function definition for a function called...Ch. 4.3 - Write a function definition for a function called...Ch. 4.3 - Write a function definition for a function isDigit...Ch. 4.3 - Write a function definition for a function...Ch. 4.4 - What is the purpose of the comment that...Ch. 4.4 - Prob. 16STECh. 4.4 - Prob. 17STECh. 4.4 - Carefully describe the process of program testing.Ch. 4.4 - Prob. 19STECh. 4.5 - If you use a variable in a function definition,...Ch. 4.5 - Suppose a function named Function1 has a variable...Ch. 4.5 - The following function is supposed to take as...Ch. 4.5 - Prob. 23STECh. 4.6 - Prob. 24STECh. 4.6 - Prob. 25STECh. 4.6 - Prob. 26STECh. 4.6 - Suppose you have two function definitions with the...Ch. 4.6 - This question has to do with the Programming...Ch. 4.6 - Prob. 29STECh. 4 - A liter is 0.264179 gallons. Write a program that...Ch. 4 - Modify your program from Practice Program 1 so...Ch. 4 - The price of stocks is sometimes given to the...Ch. 4 - Write a program to gauge the rate of inflation for...Ch. 4 - Enhance your program from the previous Practice...Ch. 4 - Write a function declaration for a function that...Ch. 4 - The gravitational attractive force between two...Ch. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Write a program that computes the annual after-tax...Ch. 4 - Write a program that asks for the users height,...Ch. 4 - Modify your program from Programming Project 2 so...Ch. 4 - Write a program that outputs the lyrics for the...Ch. 4 - To maintain ones body weight, an adult human needs...Ch. 4 - You have invented a vending machine capable of...Ch. 4 - Your time machine is capable of going forward in...Ch. 4 - Do Programming Project 11 from Chapter 3 except...Ch. 4 - Your sports league uses the following lottery...Ch. 4 - Do Programming Project 14 from Chapter 3, the Edoc...
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