Skip to main content

Engineering Computer Science C++ How to Program (10th Edition)

Program Plan Include header files. Myclass, a user-defined class is created for the example with the string variable "name". Define a constructor and destructor for the class. Start the main function Create an object of the class "Myclass" M1 outside the try block. Create an object of the class "Myclass" M2 inside the try block. Throw an exception to see the order of destructor function calling. Use catch statement to handle the exception Return and Exit Program Description: Program to illustrate that all destructors for objects constructed in a block are called before an exception is thrown from that block. Program // Include header files #include <iostream> using namespace std; // create a class to test constructor and destructor order of calling class Myclass { string name; public: Myclass(string n) // constructor { name=n; cout<< "\n"<<name<<" created " ; } ~Myclass() // destructor { cout<<"\n"<<name<<" destroyed"; } }; //main function started int main() { Myclass M1("Object outside try"); // object created outside try block try { Myclass M2("Object inside try"); // object created inside try block throw "Throwing Error"; // Exception thrown } catch(const char *c) // catching the exception { cout<<"\n"<<c; } } Output It is evident from the output, that the M2 object which is declared inside the try block calls its destructor first on encountering the throw statement. Thus, we can say destructors for objects constructed in a block are called before an exception is thrown from that block.

Program Plan Include header files. Myclass, a user-defined class is created for the example with the string variable "name". Define a constructor and destructor for the class. Start the main function Create an object of the class "Myclass" M1 outside the try block. Create an object of the class "Myclass" M2 inside the try block. Throw an exception to see the order of destructor function calling. Use catch statement to handle the exception Return and Exit Program Description: Program to illustrate that all destructors for objects constructed in a block are called before an exception is thrown from that block. Program // Include header files #include <iostream> using namespace std; // create a class to test constructor and destructor order of calling class Myclass { string name; public: Myclass(string n) // constructor { name=n; cout<< "\n"<<name<<" created " ; } ~Myclass() // destructor { cout<<"\n"<<name<<" destroyed"; } }; //main function started int main() { Myclass M1("Object outside try"); // object created outside try block try { Myclass M2("Object inside try"); // object created inside try block throw "Throwing Error"; // Exception thrown } catch(const char *c) // catching the exception { cout<<"\n"<<c; } } Output It is evident from the output, that the M2 object which is declared inside the try block calls its destructor first on encountering the throw statement. Thus, we can say destructors for objects constructed in a block are called before an exception is thrown from that block.

Solution Summary: The author illustrates that all destructors for objects constructed in a block are called before an exception is thrown.

C++ How to Program (10th Edition)

C++ How to Program (10th Edition)

10th Edition

ISBN: 9780134448237

Author: Paul J. Deitel, Harvey Deitel

Publisher: PEARSON

See similar textbooks

Concept explainers

A file with an extension that has some predefined declarations and definitions is called a header file. Every computer program imports a set of header files to perform common tasks such as getting input, displaying output, and so forth. Every language ha…

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

Blurred answer

Chapter 17, Problem 17.23E

Chapter 17, Problem 17.25E

Students have asked these similar questions

Is there any way to skip Finally block of exception even if some exception occurs in the exception block?

Has a catchphrase been used? What exactly does a finally clause mean? How do catch and finally operate in an exception program?

Is this statement true or false? PYHTHON!! Exceptions are errors that create an Exception object and continue running the program.

Chapter 17 Solutions

C++ How to Program (10th Edition)

Ch. 17 - (Exceptional Conditions) List various exceptional...Ch. 17 - (Catch Parameter) Under what circumstances would...Ch. 17 - (throw Statement) A program contains the statement...Ch. 17 - (Exception Handling vs. Other Schemes) Compare and...Ch. 17 - Prob. 17.19E Ch. 17 - Prob. 17.20E Ch. 17 - Prob. 17.21E Ch. 17 - (Catching Derived-Class Exceptions) Use...Ch. 17 - (Throwing the Result of a Conditional Expression)...Ch. 17 - Prob. 17.24E

Ch. 17 - Prob. 17.25E Ch. 17 - Prob. 17.26E Ch. 17 - Prob. 17.27E Ch. 17 - Prob. 17.28E Ch. 17 - Prob. 17.29E Ch. 17 - Prob. 17.30E Ch. 17 - Prob. 17.31E

Knowledge Booster

Background pattern image

Computer Science

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.

Similar questions

Recommended textbooks for you

EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT

Text book image

EBK JAVA PROGRAMMING

Computer Science

ISBN:9781337671385

Author:FARRELL

Publisher:CENGAGE LEARNING - CONSIGNMENT

SEE MORE TEXTBOOKS