12 Questions
What is the purpose of the catch block in a try-catch statement?
The purpose of the catch block is to execute one or more statements if an exception is thrown within the try block.
What is the difference between throwing an exception using throw; and throw "Division by zero condition!";?
Throwing throw; will re-throw the current exception, while throw "Division by zero condition!"; will throw a new exception with the string value "Division by zero condition!" as the exception.
Explain the purpose of the try block in a try-catch statement.
The try block contains the program statements that might cause an exception to be generated or 'thrown' by the program.
What is the purpose of the throw statement in a try-catch statement?
The throw statement is used to throw an exception, which can be of any type, within the try block.
How can you prevent a Divide By Zero Exception in a division operation with integer or decimal values?
To prevent the Divide By Zero Exception, ensure that the denominator in a division operation with integer or decimal values is non-zero.
What is the purpose of the vector class in programming?
The vector class is a template class of sequence containers that are capable of storing multiple elements of any defined data type in a contiguous block of memory, unlike raw arrays.
What is an exception in the context of C++ programming?
An exception is an unwanted program state or a problem that arises during the execution of a program, such as an attempt to divide by zero.
What is the purpose of exception handling in C++?
Exception handling provides a way to transfer control from one part of a program to another, and is commonly used to handle error situations.
Describe the process of exception handling in C++.
In C++, exception handling proceeds by: 1) Some library software or your code signals that something unusual has happened (throwing an exception). 2) At some other place in your program, you place the code that deals with the exceptional case (handling the exception).
What is the purpose of a try-catch statement block in C++?
A try-catch statement block is used to "trap" program exceptions, allowing you to handle exceptional cases.
Can a single try block have multiple catch statements in C++? If so, why?
Yes, you can list down multiple catch statements to catch different types of exceptions in case your try block raises more than one exception in different situations.
What is a good programming practice when dealing with exceptions, as suggested by the text?
It is often easier to write a program by first assuming that nothing incorrect will happen. Once it works correctly for the expected cases, add code to handle the exceptional cases.
Study Notes
Exception Handling
- An exception is an unwanted program state that arises during execution, such as dividing by zero.
- Exceptions provide a way to transfer control from one part of a program to another.
- Exception handling is used to handle error situations, making it easier to write a program by assuming nothing incorrect will happen initially.
Throwing and Catching Exceptions
- An exception is thrown using a throw statement, which can be used to throw a value of any type.
- The try-catch statement block is used to "trap" program exceptions, with the try block containing statements that might cause an exception.
- The catch block follows the try block, executing one or more statements if an exception is thrown.
- A throw statement is used to throw an exception, such as
throw "Division by zero condition!";.
Divide By Zero Exception
- Trying to divide an integer or Decimal number by zero throws a Divide By Zero Exception exception.
- To prevent this exception, ensure the denominator in a division operation with integer or Decimal values is non-zero.
Vectors
- Vectors are template classes of sequence containers that can store multiple elements of any defined data type.
- They store elements in a contiguous block of memory.
- Vectors are access-safe as long as built-in access methods are used.
Learn about C++ exceptions and how they are used to handle exceptional circumstances during program execution. Explore how exceptions help in transferring control from one part of a program to another, with examples like handling errors during data copying.
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