Chapter 16.1, Problem 16.4CP

Explanation of Solution

The “try” block:

• The “try” block is starts with the keyword “try” and it contains the code which will have the possibility to generate an exception.
• The “try” block must be followed by one or more “catch” blocks which are denoted as exception handlers.

The “catch” block:

• The “catch” block is starts with the keyword “catch” and it is followed by an “exception parameter”.
• The Catch block contains the code to be executed when the error occurred in Try block.

The general syntax for “try/catch” as follows:

try

{

//code which causes an exception;try block

}

Catch(Exception_argument)

{

//code which handles the exception;catch block

}

//Repeat catch blocks as many as needed

Process of the “try/catch” blocks:

• The “try” block contains a block of statements which may cause an exception to be thrown.
• Once an exception is caught, it has to be thrown to the “catch” block using “throw” statement. After executing the “catch” block, the program resumes at the statement, which follows the “try/catch” blocks.

Example:

For example, consider the below code containing an exception handler for dividing two integers:

#include <iostream>

#include <string>

using namespace std;

//function definition of "divide"

double divide(int a, int b)

{

//The value of "b" is 0

if (b == 0)

{

//declare and define the string

string exception="ERROR: denominator should not be 0...