Arizona State University (ASU) CSE100 Principles of Programming with C++ Midterm 1 Practice Exam

Reading user input in C++ is primarily done using `std::cin`. This is the standard input stream in the C++ Standard Library and is specifically designed to read data from user input, typically from the keyboard. When using `std::cin`, you can easily extract various data types, such as integers, floats, and strings, by using the extraction operator (`>>`).

For example, if you want to read an integer from the user, you would write:

```cpp

int number;

std::cin >> number;

```

This line of code waits for the user to input a number, and then it stores that number in the variable `number`. This method is not only straightforward but also integrated into C++'s type system, allowing automatic type conversions when necessary.

Choosing alternatives like `printf` and `std::put` does not align with the standard C++ practices for reading input. `printf` is primarily used for output, while `std::put` is not a commonly used function for this purpose. The term `input()` does not exist in standard C++. Thus, `std::cin` is the most appropriate and correct way to handle user input in C++.