Basic C++ Program Structures

What is the purpose of comments in a C++ program?

• The purpose of comments in a C++ program is to enhance code readability and maintainability.

• To execute the program faster

• To define functions in the code

• To store variables temporarily

Identify the line that represents a preprocessor directive.

• #define MAX_SIZE 100

• void function() {}

• #include

• int main() { return 0; }

What is the role of header files in a C++ program?

• Header files are only used for comments in C++ programs.

• Header files contain the main function of a C++ program.

• Header files are used to store user input data.

• Header files provide declarations for functions and classes, facilitating code organization and reuse.

Describe the main() function in a C++ program.

• The main() function is optional in a C++ program.

• The main() function can only take one argument.

• The main() function is the starting point of a C++ program, defined as 'int main(int argc, char* argv[])'.

• The main() function must return a string type.

What does a return statement do in a C++ function?

• A return statement creates a new variable in the function.

• A return statement pauses the function until further notice.

• A return statement exits a function and provides a value to the caller.

• A return statement only prints a value to the console.

How do comments improve code readability?

• Comments are used to format the code visually.

• Comments should be avoided to keep the code clean.

• Comments are only necessary for complex algorithms.

• Comments improve code readability by providing explanations and context, making it easier to understand the code's purpose and logic.

What is the syntax for including a header file in C++?

• #include or #include "header_file"

• #include {header_file}

• import header_file;

• #include

Explain the significance of the main() function in program execution.

• The main() function is optional and can be omitted in most programs.

• The main() function is used for defining global variables only.

• The main() function is where all the program's data is stored.

• The main() function is crucial as it is the designated starting point for program execution.

What type of value does a return statement typically provide?

• The type of a function's parameters.

• The result of a function's execution.

• The input value of a function.

• The memory address of a function.

How can preprocessor directives affect the compilation of a C++ program?

• Preprocessor directives are irrelevant to the compilation process.

• Preprocessor directives can include/exclude code, define macros, and control compilation conditions.

• Preprocessor directives can only optimize code performance.

• Preprocessor directives are used to manage memory allocation.