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Chapter 2: Problem 3

Which of the following is a reserved word in \(\mathrm{C}++?\) a. Const b. include c. Char d. void e. int f. Return

Short Answer

Expert verified
Const, char, void, int, and return are reserved words in C++.

Step by step solution

01

Understand Reserved Words

Reserved words in programming languages are specified words that cannot be used for anything other than their intended purpose, such as for variable, function, or object names. They have special functionality attached to them.
02

List Reserved Words in C++

The reserved words in C++ include keywords like 'int', 'char', 'void', 'return', 'const', and more that are used to identify built-in functions and operations.
03

Examine Each Option

Review each given option to determine if it is a reserved keyword. The provided options are: a) Const, b) include, c) Char, d) void, e) int, f) Return.
04

Identify Reserved Words

Cross-reference each option with reserved keywords in C++. In C++, 'const', 'char', 'void', 'int', and 'return' are reserved keywords, while 'include' is not a reserved keyword.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

C++ Programming
C++ is a powerful general-purpose programming language created as an extension of the C programming language. It was designed for system programming, yet it's also remarkably flexible and can be used for almost any purpose, from game development to complex system operations. C++ combines both high-level and low-level language features. This enables developers to have control over system resources and memory management, while also allowing for object-oriented programming, which enhances code reuse and modular programming.

Students learning C++ will find it has strict syntax and semantics that ensure precision. These characteristics make it a great language for understanding programming logic and concepts. For beginners, it is often recommended to first get a solid understanding of variables, data types, and control structures in C++ as these form the foundational concepts upon which advanced topics are built. Familiarity with these elements will make tackling concepts like pointers, dynamic memory allocation, and class inheritance easier.
Keywords in C++
Keywords in C++ are fundamentally important as they represent predefined and reserved words in the language that have a special meaning and cannot be used for identifiers such as variable names. These keywords help define the language's structure and syntax. Here's why you should know about them:

  • Standardization: Keywords are part of a standardized set across C++ compilers, ensuring your code is portable across different platforms.
  • Special Functions: Each keyword has a specific function, such as `int` for integer variables or `void` for functions that return no value.

In C++, some of the essential keywords you must know include:

  • int: declares an integer variable.
  • char: declares a character type variable.
  • void: specifies that no value is returned by a function.
  • return: signifies the end of a function and possibly returns a value.
  • const: specifies a variable whose value cannot be changed after initialization.

Understanding and recognizing these keywords will allow you to write syntactically correct programs, and ensure you don't mistakenly use them as identifiers.
Programming Language Concepts
In programming languages, concepts like reserved words, variables, data types, and control structures form the backbone of coding. Let's unpack why these concepts are essential to mastering programming.

Reserved words, as discussed, are crucial as they guide the language syntax, but beyond that, understanding variables and data types in languages like C++ aids in effective data representation and manipulation. Variables are placeholders for data, and data types specify what kind of data can be stored there and how much space it occupies.

Next, consider control structures. They dictate the flow of execution in a program, allowing decisions, loops, and branching. These structures ensure that programs can handle complex decision-making via conditionals (like `if`, `else`), loops (`for`, `while`) for repetitive operations, and more.

Once you grasp these foundational concepts, you'll be equipped to understand even the most complex aspects of programming languages, such as data abstraction, polymorphism, and algorithm design. Always remember, the goal is to create robust, efficient, and clear code by mastering these building blocks.

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Most popular questions from this chapter

include #include using namespace std; const double X = 13.45; const int Y=34; const … # Rewrite the following program so that it is properly formatted. #include #include using namespace std; const double X = 13.45; const int Y=34; const char BLANK= ' '; int main() {string firstName,lastName;int num; double salary; cout<<"Enter first name: "; cin>> firstName; cout<>lastName;cout<>num;cout<

Write C++ statement(s) that accomplish the following: a. Declare int variables x and y. Initialize x to 25 and y to 18. b. Declare and initialize an int variable temp to 10 and a char variable ch to 'A'. c. Update the value of an int variable x by adding 5 to it. d. Declare and initialize a double variable payRate to 12.50. e. Copy the value of an int variable firstNum into an int variable tempNum. f. Swap the contents of the int variables x and y. (Declare additional variables, if necessary.) g. Suppose x and y are double variables. Output the contents of x, y, and the expression x + 12 / y - 18. h. Declare a char variable grade and set the value of grade to 'A'. i. Declare int variables to store four integers. j. Copy the value of a double variable z to the nearest integer into an int variable x.

include using namespace s… # The following program has syntax errors. Correct them. On each successive line, assume that any preceding error has been corrected. #include using namespace std; int main() { int temp; string first; cout << "Enter first name: ; cin >> first cout << endl; cout << "Enter last name: ; cin >> last; cout << endl; cout << "Enter today's temperature: "; cin >> temperature; cout << endl; cout << first << " " << last << today's temperature is: "; << temperature << endl; return 0;

Which of the following are correct \(\mathrm{C}++\) statements? a. cout \(<<\) "Hello there!" \(<<\) endl b. cout \(<<\) "Hello"; \(<<\) " There! \("<<\) endl c. cout \(<<\) "Hello" \(<<\) " There! \("<<\) endl d. cout \(<<\) 'Hello There!' \(<<\) endl

What action must be taken before a variable can be used in a program?
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