# Author:  James Tam

# Version: June 7, 2017
# Replace sys.io etc. with print(<string>,end="")

# Version: October 17, 2014
  
# A modified version of the original 'grades1.py' program.
# The functionality is identical but the way that this version reads from file
# less "Python-like" and is closer to how file-input is implemented in many
# programing languages. 

# Get information about the file name at run time from the user.   
# Try it with "gpa.txt" or "letters.txt" as the input file.
inputFileName = input ("Enter name of input file: ")
inputFile = open(inputFileName, "r")   
print("Opening file", inputFileName, " for reading.")

# Line either refers to a string of text from the file
# or an empty string if nothing can be read from the file.   
line = inputFile.readline()

# While we haven't read past the end of the file continue reading from it.
# When readLine can't read from file an empty string will be returned so
# this is what's used to form the Boolean expression for the loop.
while (line != ""):
    print(line, end="")
    line = inputFile.readline()

inputFile.close()
print("Completed reading of file", inputFileName)