Chapter 16, Problem 1RQE

The line containing a throw statement is known as the ______.

Program Description Answer

The “throw point” is a line which throws an exception by using the keyword “throw”.

Explanation of Solution

Exception:

In C++, the exception is an object used to signal or unexpected error which occurred during a program execution.

• Exception is the error, which arises at run time of a program.

Throw point:

The “throw point” is a line which throws an exception while executing the program. It uses the keyword “throw” to throw an exception.

Example:

Consider the following code segment which throws an exception when it receives value “0” for the argument “b”:

//Function "division" is used to divide two integers

double division(int a, int b)

{

    //The value of "b" is 0

    if (b == 0)

    {

        //throw point

        //throw an exception contains message

        throw "ERROR: denominator should not be "0".\n " ;

    }

    //otherwise, do the division

    else

    {

        //return the result

        return static_ cast<double>(a)/b;

    }

}

Explanation:

In the above example, the “throw” statement is used to throw a message and the statement is referred as “throw point”.

• After the execution of “throw” statement, the program control will move to another part of the same program is referred as exception handler.