Exercise 4: Plotting a Histogram (20%)
Session 10: Week 20/21: Letter Frequencies
Exercise 2: More Counting... (30%)
Next you are required to enhance the program further so that it will also calculate the total number of all alphabetic characters read, and output, for each character, both the actual number of times it occurred, and the percentage this represents of the total number of alphabetic characters encountered.
Again, test and document the program carefully.