Which of the following is the correct syntax to read a single character from…

Concept

In C++, single-character input is performed through an input stream. The member function get(char&) extracts one character and stores it in the supplied char variable; unlike formatted extraction with operator>>, it can also read whitespace.

Application

1. Let char ch; be the destination variable.

2. The complete standard-library call is std::cin.get(ch);.

3. The official source paper writes this member-call syntax in the shortened form get(ch), with ch as the argument.

Contrast

• The form read ch() separates read from the call ch(); it is not the input-stream member-call form.

• The form getlinech() names a different, non-standard identifier; std::getline is instead used to read a sequence such as a line.

• The form get(ch) represents the intended one-argument member-function call, written fully as std::cin.get(ch).

• “More than one of the above” would require at least two listed syntaxes to represent the intended operation.

• “None of the above” would require the intended form to be absent from the list.

Cross-check

With input consisting of a leading space followed by A, std::cin.get(ch) first stores the space in ch. This confirms that get consumes exactly one character, including whitespace.

Result

Therefore, the source-paper form is get(ch).