Starting Out with C++ from Control Structures to Objects (9th Edition)
9th Edition
ISBN: 9780134498379
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 9, Problem 20RQE
Under older compilers, if the new operator cannot allocate the amount of memory requested, it returns _________.
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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 9 Solutions
Starting Out with C++ from Control Structures to Objects (9th Edition)
Ch. 9.5 - Prob. 9.1CPCh. 9.5 - Write the definition statement for a variable...Ch. 9.5 - List three uses of the symbol in C++.Ch. 9.5 - What is the output of the following code? int x =...Ch. 9.5 - Rewrite the following loop so it uses pointer...Ch. 9.5 - Prob. 9.6CPCh. 9.5 - Prob. 9.7CPCh. 9.5 - Is each of the following definitions valid or...Ch. 9.9 - Prob. 9.9CPCh. 9.9 - Give an example of the proper way to call the...
Ch. 9.9 - Complete the following program skeleton. When...Ch. 9.9 - Look at the following array definition: const int...Ch. 9.9 - Assume ip is a pointer to an int. Write a...Ch. 9.9 - Prob. 9.14CPCh. 9.9 - Prob. 9.15CPCh. 9.9 - Prob. 9.16CPCh. 9.9 - Prob. 9.17CPCh. 9 - What does the indirection operator do?Ch. 9 - Look at the following code. int x = 7; int iptr =...Ch. 9 - So far you have learned three different uses for...Ch. 9 - Prob. 4RQECh. 9 - Prob. 5RQECh. 9 - Prob. 6RQECh. 9 - What is the purpose of the new operator?Ch. 9 - What happens when a program uses the new operator...Ch. 9 - Prob. 9RQECh. 9 - Prob. 10RQECh. 9 - Prob. 11RQECh. 9 - Prob. 12RQECh. 9 - Each byte in memory is assigned a unique...Ch. 9 - The _________ operator can be used to determine a...Ch. 9 - Prob. 15RQECh. 9 - The ________ operator can be used to work with the...Ch. 9 - Array names can be used as ________, and vice...Ch. 9 - Prob. 18RQECh. 9 - The ________ operator is used to dynamically...Ch. 9 - Under older compilers, if the new operator cannot...Ch. 9 - Prob. 21RQECh. 9 - When a program is finished with a chunk of...Ch. 9 - You should only use pointers with delete that were...Ch. 9 - Prob. 24RQECh. 9 - Look at the following array definition: int...Ch. 9 - Prob. 26RQECh. 9 - Assume tempNumbers is a pointer that points to a...Ch. 9 - Look at the following function definition: void...Ch. 9 - Prob. 29RQECh. 9 - Prob. 30RQECh. 9 - Prob. 31RQECh. 9 - T F The operator is used to get the address of a...Ch. 9 - T F Pointer variables are designed to hold...Ch. 9 - T F The symbol is called the indirection...Ch. 9 - T F The operator dereferences a pointer.Ch. 9 - T F When the indirection operator is used with a...Ch. 9 - T F Array names cannot be dereferenced with the...Ch. 9 - Prob. 38RQECh. 9 - T F The address operator is not needed to assign...Ch. 9 - T F You can change the address that an array name...Ch. 9 - T F Any mathematical operation, including...Ch. 9 - T F Pointers may be compared using the relational...Ch. 9 - T F When used as function parameters, reference...Ch. 9 - T F The new operator dynamically allocates memory.Ch. 9 - T F A pointer variable that has not been...Ch. 9 - Prob. 46RQECh. 9 - T F In using a pointer with the delete operator,...Ch. 9 - Prob. 48RQECh. 9 - Prob. 49RQECh. 9 - int x, ptr = nullptr; ptr = x;Ch. 9 - Prob. 51RQECh. 9 - Prob. 52RQECh. 9 - Prob. 53RQECh. 9 - float level; int fptr = level;Ch. 9 - Prob. 55RQECh. 9 - Prob. 56RQECh. 9 - Prob. 57RQECh. 9 - Prob. 58RQECh. 9 - int pint = nullptr; pint = new int[100]; //...Ch. 9 - Prob. 60RQECh. 9 - Prob. 61RQECh. 9 - Prob. 62RQECh. 9 - Array Allocator Write a function that dynamically...Ch. 9 - Test Scores #1 Write a program that dynamically...Ch. 9 - Drop Lowest Score Modify Problem 2 above so the...Ch. 9 - Test Scores #2 Modify the program of Programming...Ch. 9 - Prob. 5PCCh. 9 - Case Study Modification #1 Modify Program 9-19...Ch. 9 - Case Study Modification #2 Modify Program 9-19...Ch. 9 - Mode Function In statistics, the mode of a set of...Ch. 9 - Median Function In statistics, when a set of...Ch. 9 - Reverse Array Write a function that accepts an int...Ch. 9 - Array Expander Write a function that accepts an...Ch. 9 - Element Shifter Write a function that accepts an...Ch. 9 - Movie Statistics Write a program that can be used...
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