Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++'

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Test your C++ skills with our quiz based on Bruce Eckel's 'Thinking in C++'. Dive into object-oriented programming, advanced topics, and fundamentals. Perfect for learners and experts alike. Assess your knowledge and become a C++ master!

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What is the purpose of using 'require(s, "un-initialized s");' in the 'oneChar()' function?

To ensure 's' is not null before usage
To allocate memory for 's'
To initialize 's' with a default value if it is null
To print 's' for debugging purposes

The correct answer is: To ensure 's' is not null before usage

Context The purpose of using the 'require()' statement in the 'oneChar()' function is to perform a validation check before using the variable 's'. This ensures that 's' is not null and avoids any potential errors or crashes that may occur if 's' is used without being initialized. The statement 'require(s, "un-initialized s")' means that if 's' is null, then the error message "un-initialized s" will be displayed. Why the other options are incorrect: Option B: Using 'require()' does not allocate memory for 's' but simply checks if it is null before usage. Option C: Initializing 's' with a default value is not the purpose of using 'require()'. Its purpose is to check the validity of 's' before using it. Option D: Printing 's' for debugging purposes is not related