Chapter 3, Problem 28RQE

A)

Explanation of Solution

Purpose of the given code:

The main purpose of the given code is to find the product of two numbers; the process involved is getting two numbers of data type “double” from the user, then calculating the sum of the two numbers, and storing it into another variable and finally displaying the sum as an output to the user.

Syntax error:

An error which occurs on the source code of a program is referred as “syntax error” because the computer programs strictly follow the syntax rules.

• If the code fails to prove its language syntax format, then the compiler will throw errors.

List of errors identified in the given code:

The code that is given contains some errors and those are listed as follows:

Error 1:

The definitions of the keywords are being defined in the header file.

In “Line 1”, delete the semicolon (;) at the end of the header file “#include<iostream>”.

Error 2:

When a variable is declared as a constant item, no modification can be made to that value of the variables that constant hold. The value may change during the runtime.

In “Line 5”, the variables values cannot be constant when the user enters the value at the runtime and the keyword “const” should be removed.

Error statement:

const int number1, number2, product;

Corrected statement:

int number1, number2, product;

Error 3:

Every line in “C++” must be terminated using a semicolon “;”...

B)

Explanation of Solution

Purpose of the given code:

The main purpose of the given code is to find the product of two numbers; the process involved is getting two numbers of data type “double” from the user, then calculating the sum of the two numbers, and storing it into another variable and finally displaying the sum as an output to the user.

Syntax error:

An error which occurs on the source code of a program is referred as “syntax error” because the computer programs strictly follow the syntax rules.

• If the code fails to prove its language syntax format, then the compiler will throw errors.

List of errors identified in the given code:

The code that is given contains some errors and those are listed as follows:

Error 1:

The definitions of the keywords are being defined in the header file.

In “Line 1”, delete the semicolon (;) at the end of the header file “#include<iostream>”.

Error 2:

The main method is important to start the program. So, in “Line 3” must contain the datatype “int” before the term “main” and it should by brackets “()”.

Error 3:

Every line in “C++” must be terminated using a semicolon “;”.

In “Line 7” and “Line 8”, the output statement is not terminated with a semicolon“;”.

Error statement:

cout << "Enter two numbers and I will multiply\n"

cout <<"them by 50 for you.\n"

Corrected statement:

cout << "Enter two numbers and I will multiply\n";

cout <<"them by 50 for you.\n";

Error 4:

Operators in C++ can be combined such as “+=”, “-=”, “*=” to perform few of the mathematical operations...