Reads a line of text from standard input, within a specified time (t) in seconds, and returns it as a string (char *), sans trailing newline character. (Ergo, if user inputs only "\n", returns "" not NULL.) Returns NULL * upon error or no input whatsoever (i.e., just EOF), or if the user failed to provided an input within the specified time. Leading and trailing whitespace is not ignored. Stores string on heap (via malloc); memory must be freed by caller to avoid leak. With each key pressed, the contents of the current line in the terminal window is rewritten (the timer and the text entered by the user) to update the remaining time left.
This function is a modified version of CS50's library's (https://manual.cs50.net/library/) GetString function. Supports Windows only since it makes use of "conio" library.
Current Known Issue(s): Breaks when the string entered by the user exceeds the terminal column width.