Starting Out with Python (4th Edition)
4th Edition
ISBN: 9780134444321
Author: Tony Gaddis
Publisher: PEARSON
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Chapter 2, Problem 4PE
Total Purchase
A customer in a store is purchasing five items. Write a
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How to develop a C program that receives the message sent by the provided program and displays the name and email included in the message on the screen?Here is the code of the program that sends the message for reference:
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.
14. Show that the language
L= {wna (w) < Nь (w) < Nc (w)}
is not context free.
Chapter 2 Solutions
Starting Out with Python (4th Edition)
Ch. 2.1 - Who is a programmers customer?Ch. 2.1 - What is a software requirement?Ch. 2.1 - What is an algorithm?Ch. 2.1 - What is pseudocode?Ch. 2.1 - Prob. 5CPCh. 2.1 - Prob. 6CPCh. 2.3 - Write a statement that displays your name.Ch. 2.3 - Write a statement that displays the following...Ch. 2.3 - Write a statement that displays the following...Ch. 2.5 - Prob. 10CP
Ch. 2.5 - Which of the following are illegal variable names...Ch. 2.5 - Prob. 12CPCh. 2.5 - Is the following assignment statement valid or...Ch. 2.5 - Prob. 14CPCh. 2.5 - Look at the following assignment statements:...Ch. 2.5 - What will be displayed by the following program?...Ch. 2.6 - You need the user of a program to enter a...Ch. 2.6 - Prob. 18CPCh. 2.7 - Prob. 19CPCh. 2.7 - Prob. 20CPCh. 2.7 - Prob. 21CPCh. 2.8 - How do you suppress the print functions ending...Ch. 2.8 - How can you change the character that is...Ch. 2.8 - Prob. 24CPCh. 2.8 - Prob. 25CPCh. 2.8 - What does the statement print (format (65.4321,...Ch. 2.8 - What does the statement print (format (987654.129,...Ch. 2.9 - What are three advantages of using named...Ch. 2.9 - Write a Python statement that defines a named...Ch. 2.10 - Prob. 30CPCh. 2.10 - Prob. 31CPCh. 2.10 - Prob. 32CPCh. 2.10 - Prob. 33CPCh. 2.10 - Prob. 34CPCh. 2.10 - Prob. 35CPCh. 2.10 - Prob. 36CPCh. 2.10 - Prob. 37CPCh. 2.10 - Prob. 38CPCh. 2.10 - Prob. 39CPCh. 2.10 - Prob. 40CPCh. 2.10 - Prob. 41CPCh. 2.10 - Prob. 42CPCh. 2.10 - Prob. 43CPCh. 2.10 - Prob. 44CPCh. 2.10 - Prob. 45CPCh. 2 - A ______ error does not prevent the program from...Ch. 2 - Prob. 2MCCh. 2 - A(n) __________ is a set of well-defined logical...Ch. 2 - An Informal language that has no syntax rules and...Ch. 2 - A _______ is a diagram that graphically depicts...Ch. 2 - A ______ is a sequence of characters. a. char...Ch. 2 - Prob. 7MCCh. 2 - Prob. 8MCCh. 2 - A string literal in Python must be enclosed in...Ch. 2 - Prob. 10MCCh. 2 - A(n) __________ makes a variable reference a value...Ch. 2 - This symbol marks the beginning of a comment in...Ch. 2 - Which of the following statements will cause an...Ch. 2 - In the expression 12 + 7, the values on the right...Ch. 2 - This operator performs integer division. a. // b....Ch. 2 - This is an operator that raises a number to a...Ch. 2 - This operator performs division, but instead of...Ch. 2 - Prob. 18MCCh. 2 - Which built-in function can be used to read input...Ch. 2 - Prob. 20MCCh. 2 - A magic number is _______. a. a number that is...Ch. 2 - A _______ is a name that represents a value that...Ch. 2 - Programmers must be careful not to make syntax...Ch. 2 - In a math expression, multiplication and division...Ch. 2 - Variable names can have spaces in them.Ch. 2 - In Python, the first character of a variable name...Ch. 2 - If you print a variable that has not been assigned...Ch. 2 - What does a professional programmer usually do...Ch. 2 - What is pseudocode?Ch. 2 - Computer programs typically perform what three...Ch. 2 - If a math expression adds a float to an int, what...Ch. 2 - What is the difference between floating-point...Ch. 2 - What is a magic number? Why are magic numbers...Ch. 2 - Assume a program uses the named constant PI to...Ch. 2 - Write Python code that prompts the user to enter...Ch. 2 - Write Python code that prompts the user to enter...Ch. 2 - Write assignment statements that perform the...Ch. 2 - Assume the variables result, w, x, y, and z are...Ch. 2 - Write a Python statement that assigns the sum of...Ch. 2 - Write a Python statement that subtracts the...Ch. 2 - Write a Python statement that multiplies the...Ch. 2 - Prob. 8AWCh. 2 - What would the following display? num = 99 num = 5...Ch. 2 - Assume the variable sales references a float...Ch. 2 - Assume the following statement has been executed:...Ch. 2 - What will the following statement display?...Ch. 2 - Write a turtle graphics statement that draws a...Ch. 2 - Write the turtle graphics statements to draw a...Ch. 2 - Write the turtle graphics statements to draw a...Ch. 2 - Personal Information Write a program that displays...Ch. 2 - Sales Prediction A company has determined that its...Ch. 2 - Land Calculation One acre of land is equivalent to...Ch. 2 - Total Purchase A customer in a store is purchasing...Ch. 2 - Distance Traveled Assuming there are no accidents...Ch. 2 - Sales Tax Write a program that will ask the user...Ch. 2 - Miles-per-Gallon A car's miles-per-gallon (MPG)...Ch. 2 - Tip, Tax, and Total Write a program that...Ch. 2 - Celsius to Fahrenheit Temperature Converter Write...Ch. 2 - Ingredient Adjuster A cookie recipe calls for the...Ch. 2 - Male and Female Percentages Write a program that...Ch. 2 - Stock Transaction Program Last month, Joe...Ch. 2 - Planting Grapevines A vineyard owner is planting...Ch. 2 - Compound Interest When a bank account pays...Ch. 2 - Turtle Graphics Drawings Use the turtle graphics...
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