Ace Your C++ Skills 2025 – Rock the ‘Thinking in C++’ Challenge!

Question: 1 / 565

What must be done before 'oneChar()' can return characters from the string 'a'?

Call 'oneChar()' with no arguments

Call 'oneChar(a)' to initialize 's' to 'a'

Before 'oneChar()' can return characters from the string 'a', the function must first be initialized with the string 'a'. This is done by calling 'oneChar(a)' which will set the value of 's' to be equal to 'a'.

Option A is incorrect because simply calling 'oneChar()' without any arguments will not initialize 's' to the string 'a'.

Option C is incorrect because declaring 'a' as a global variable does not automatically set the value of 's' to be equal to 'a'.

Option D is incorrect because manually setting 's' to the start of 'a' does not initialize the function with the string 'a'.

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Declare 'a' as a global variable

Manually set 's' to the start of 'a'

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