cin does not wait for input

Sure! Here is an explanation of why cin does not wait for input in C++:

The cin object is part of the C++ standard library and is used for reading input from the user or from a file.
When you use cin to read input, it expects the user to provide the input and press the "Enter" key.
By default, cin reads input from the standard input stream, which is usually connected to the keyboard.
When you use cin to read input, the program execution is blocked until the user provides input and presses "Enter".
However, there are cases where cin may not wait for input. This can happen in the following situations:
If there is already input available in the input buffer, cin will immediately read that input and continue with the program execution. This can happen if the user has already entered input before the cin statement is executed.
If the input stream is in a bad state, such as when the input format does not match what cin expects, cin will set an error flag and stop waiting for input. In this case, you need to clear the error state and discard any invalid input before cin can wait for new input.
If the input stream reaches the end-of-file (EOF) condition, cin will stop waiting for input. This can happen if the input is being read from a file and there is no more input available.
To ensure that cin waits for input, you can use the std::getline() function to read a line of input instead. This function will wait for the user to provide input and press "Enter" before returning.

I hope this explanation helps! Let me know if you have any further questions.