Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
4th Edition
ISBN: 9780134787961
Author: Tony Gaddis, Godfrey Muganda
Publisher: PEARSON
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Chapter 2, Problem 13PC
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typedef struct { long tipo; struct { char nome[50]; char email[40]; } dados;} MsgStruct;
int main() { int msg_id, status; msg_id = msgget(1000, 0600 | IPC_CREAT); exit_on_error(msg_id, "Creation/Connection"); MsgStruct msg; msg.tipo = 5; strcpy(msg.dados.nome, "Pedro Silva"); strcpy(msg.dados.email, "pedro@sapo.pt"); status = msgsnd(msg_id, &msg, sizeof(msg.dados), 0); exit_on_error(status, "Send"); printf("Message sent!\n");}
9. Let L₁=L(ab*aa), L₂=L(a*bba*). Find a regular expression for (L₁ UL2)*L2.
10. Show that the language
is not regular.
L= {a":n≥1}
11. Show a derivation tree for the string aabbbb with the grammar
S→ABλ,
A→aB,
B→Sb.
Give a verbal description of the language generated by this grammar.
Chapter 2 Solutions
Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
Ch. 2.1 - Prob. 2.1CPCh. 2.1 - When the program in Question 2.1 is saved to a...Ch. 2.1 - Complete the following program skeleton so it...Ch. 2.1 - On paper, write a program that will display your...Ch. 2.1 - Prob. 2.5CPCh. 2.1 - Every Java application program must have...Ch. 2.2 - The following program will not compile because the...Ch. 2.2 - Study the following program and show what it will...Ch. 2.2 - On paper, write a program that will display your...Ch. 2.3 - Examine the following program. // This program...
Ch. 2.3 - What will the following program display on the...Ch. 2.4 - Which of the following are illegal variable names...Ch. 2.4 - Prob. 2.13CPCh. 2.4 - Prob. 2.14CPCh. 2.4 - Prob. 2.15CPCh. 2.4 - A program declares a float variable named number,...Ch. 2.4 - Prob. 2.17CPCh. 2.4 - Prob. 2.18CPCh. 2.4 - Prob. 2.19CPCh. 2.4 - Prob. 2.20CPCh. 2.4 - What is wrong with the following statement? char...Ch. 2.5 - Prob. 2.22CPCh. 2.5 - Prob. 2.23CPCh. 2.6 - Write statements using combined assignment...Ch. 2.7 - The following declaration appears in a program:...Ch. 2.7 - The variable a is a float and the variable b is a...Ch. 2.9 - Write a statement that declares a String variable...Ch. 2.9 - Assume that stringLength is an int variable. Write...Ch. 2.9 - Prob. 2.29CPCh. 2.9 - Prob. 2.30CPCh. 2.9 - Prob. 2.31CPCh. 2.11 - Prob. 2.32CPCh. 2.11 - How are documentation comments different from...Ch. 2.14 - Prob. 2.34CPCh. 2.14 - Write code that will display each of the dialog...Ch. 2.14 - Write code that displays an input dialog asking...Ch. 2.14 - Prob. 2.37CPCh. 2 - Every complete statement ends with a __________....Ch. 2 - The following data 72 'A' Hello World 2.8712 are...Ch. 2 - A group of statements, such as the contents of a...Ch. 2 - Which of the following are not valid assignment...Ch. 2 - Which of the following are nor valid println...Ch. 2 - The negation operator is __________. a. unary b....Ch. 2 - This key word is used to declare a named constant....Ch. 2 - These characters mark the beginning of a...Ch. 2 - These characters mark the beginning of a...Ch. 2 - These characters mark the beginning of a...Ch. 2 - Which Scanner class method would you use to read a...Ch. 2 - Which Scanner class method would you use to read a...Ch. 2 - You can use this class to display dialog boxes. a....Ch. 2 - Prob. 14MCCh. 2 - Prob. 15MCCh. 2 - True or False: A left brace in a Java program is...Ch. 2 - True or False: A variable must be declared before...Ch. 2 - True or False: Variable names may begin with a...Ch. 2 - True or False: You cannot change the value of a...Ch. 2 - True or False: Comments that begin with / / can be...Ch. 2 - True or False: If one of an operators operands is...Ch. 2 - What will the following code segments print on the...Ch. 2 - int x = 0, y=2; x = y 4; System.out.println(x +...Ch. 2 - System.out.print(I am the incredible);...Ch. 2 - System.out.print(Be careful\n);...Ch. 2 - int a, x = 23; a = x % 2; System.out.println(x +...Ch. 2 - Find the Error There are a number of syntax errors...Ch. 2 - Show how the double variables temp, weight, and...Ch. 2 - Prob. 2AWCh. 2 - Write assignment statements that perform the...Ch. 2 - Assume the variables result, w, x, y, and z are...Ch. 2 - Prob. 5AWCh. 2 - Modify the following program so it prints two...Ch. 2 - What will the following code output? int apples =...Ch. 2 - What will the following code output? double d =...Ch. 2 - What will the following code output? String...Ch. 2 - What will the following code output? String...Ch. 2 - Convert the following pseudocode to Java code. Be...Ch. 2 - Prob. 12AWCh. 2 - Write the code to set up all the necessary objects...Ch. 2 - Prob. 14AWCh. 2 - A program has a float variable named total and a...Ch. 2 - Is the following comment a single-line style...Ch. 2 - Is the following comment a single-line style...Ch. 2 - Describe what the phrase self-documenting program...Ch. 2 - Prob. 4SACh. 2 - Prob. 5SACh. 2 - Prob. 6SACh. 2 - Prob. 7SACh. 2 - Prob. 8SACh. 2 - Briefly describe the difference between variable...Ch. 2 - What is the difference between comments that start...Ch. 2 - Briefly describe what programming style means. Why...Ch. 2 - Assume that a program uses the named constant PI...Ch. 2 - Assume the file Sales Average, java is a Java...Ch. 2 - Prob. 14SACh. 2 - Name, Age, and Annual Income Write a program that...Ch. 2 - Name and Initials Write a program that has the...Ch. 2 - Personal Information Write a program that displays...Ch. 2 - Star Pattern Write a program that displays the...Ch. 2 - Sales Prediction The East Coast sales division of...Ch. 2 - Land Calculation One acre of land is equivalent to...Ch. 2 - Sales Tax Write a program that will ask the user...Ch. 2 - Cookie Calories A bag of cookies holds 40 cookies....Ch. 2 - Miles-per-Gallon A cars miles-per-gallon (MPG) can...Ch. 2 - Test Average Write a program that asks the user to...Ch. 2 - Circuit Board Profit An electronics company sells...Ch. 2 - Prob. 12PCCh. 2 - Restaurant Bill Write a program that computes the...Ch. 2 - Male and Female Percentages Write a program that...Ch. 2 - Stock Commission Kathryn bought 600 shares of...Ch. 2 - Energy Drink Consumption A soft drink company...Ch. 2 - Ingredient Adjuster A cookie recipe calls for the...Ch. 2 - Word Game Write a program that plays a word game...Ch. 2 - Stock Transaction Program Last month Joe purchased...Ch. 2 - Planting Grapevines A vineyard owner is planting...Ch. 2 - Compound Interest When a bank account pays...
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