DO NOT WRITE MAIN! Only write the function.  A 50% minimum deduction will be made if main is included.  No libraries or comments should be specified.  (OP4) Write a function to prompt the user for the filename, open the file, and verify that it opened. If the file does not open, an error message should be printed and the user re-prompted. The function should use the string passed in for the prompt string. The function should not return until the file is open. The function prototype: void openInputFile( ifstream &, string ); ifstream& - the stream to be opened. string - the prompt to be written out to the user.  Use this string when prompting the user.

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