Question

Use getline(cin, passcode) to read the entire line from input into passcode:

A) True
B) False

Answer 1

The use of getline(cin, passcode) to read an entire line of input into the variable passcode is True. The function reads to the newline character but does not add it to the string, making it ideal for capturing full lines of input with spaces.

Step-by-step explanation:

The statement to use getline(cin, passcode) to read the entire line from input into the variable passcode is True. The getline function in C++ is designed to read a whole line of text from an input stream, which in this case is std::cin, and stores it in the string variable provided as the second argument. Using getline is especially useful when you want to capture input that may contain spaces, which would otherwise be terminated if using the extraction operator cin >>.

Here is a step-by-step explanation of how it works:

1. The getline function waits for input from the user.
2. Once the user enters a line of text and hits the enter key, getline reads the entire line up to the newline character.
3. The newline character is consumed by getline but is not added to the passed string variable; in this case, passcode.
4. The inputted text is then stored in the variable passcode, including any spaces contained within the input.

It's important to also account for any initial empty lines or unwanted newline characters prior to calling getline, which can be handled with cin.ignore() if necessary