If you have already removed a character (in char variable ch) from the input stream, you can apply a member function of cin to the variable ch to return it to the input stream. Which of these does this task?
a. cin.get(ch);
b. cin.put(ch);
c. cin.peek(ch);
d. cin.putback(ch);
d)
Explanation: cin.putback(arg) takes the value of the char type argument, arg, and returns to the input stream. It does not have to be the character that was got from the input, but there is a limit to the number of times you can putback a character onto the input stream.
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