[amp_mcq option1=”cin” option2=”cout” option3=”stin” option4=”stout E. None of the above” correct=”option1″]
The correct answer is A. cin.
cin is a standard input stream in C++. It is used to read data from the keyboard. The syntax for using cin is as follows:
cin >> variable;
where variable is the variable that you want to store the data in. For example, the following code will read a number from the keyboard and store it in the variable num:
int num;
cin >> num;
The other options are incorrect. B. cout is a standard output stream. It is used to write data to the screen. C. stin and D. stout are not standard input or output streams.