File Read or Write Java & C++ Practice problem Assignment Question Case study

IO Operation File Read or Write Java & C++ Practice problem Assignment Question Case study  

 You will create a program to read student marks from an input file and generate a histogram showing the average marks for each student.  You will write the resulting histogram to a file call “histogram.txt”.

The input file is called “marks.txt”. The format of the input file is very simple. Each line is a (roll-number, marks) pair, with a space between the roll-number and the marks. A roll-number is always be between 0 and 4 inclusive. Meaning that there will be marks for no more than 5 students. Hint! Marks are always between 0 and 20 inclusive. The end of the file is reached when you read a line with just a 'q' on it. A sample input file can look like this.

0 5

1 4

1 6

2 7

0 6

q

For each student, your program will keep a running average of marks. After reading the whole file, your program should know the average marks for each roll-number. The formula for calculating a running average is:

(running_average * num_marks_seen + current_marks) / (num_marks_seen + 1)

You will now generate a histogram showing the average marks for each students and will write it to the output file. A sample histogram is shown below.

7                     *                     *                    

6          *          *                     *                    

5          *          *                     *          *         

4          *          *                     *          *         

3          *          *          *          *          *         

2          *          *          *          *          *         

1          *          *          *          *          *         

            0          1          2          3          4

Roll-numbers appear on the horizontal axis. Marks appear on the vertical axis. Oh and there will be no more than

A sample input file will be provided to you. If you don't have it, please ask for it.