Chapter 16, Problem 1RQE

Program Plan Intro

Exception:

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

• An exception has been thrown when an error has been occurred in a program.

Explanation of Solution

Throw point:

The throw point is a statement which uses the keyword “throw” to throw an exception which occurred while executing the program.

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;

}

}

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 in the same program.