Write an assembly language program that reads move review information from a text file and reports the overall scores for each movie as well as identifying the movie with the highest total score. There are four movie reviewers numbered from 1 to 4. They are submitting reviews for five movies, identified by the letters from A through E. Reviews are reported by using the letter identifying the movie, the review rating, which is a number from 0 to 100, and the reviewers identifying number. For example, to report that movie B was rated a score of 87 by reviewer 3, there will be a line in the text file that looks like this:

B,87,3

The fields within each record are separated from each other by a comma. Your program must store the movie review scores in a two-dimensional array (4 rows by 5 columns). Each row represents a reviewer. Each column represents a movie. Initialize the array to zeroes and read the movie review information from a file. After reading and processing the whole file, display a report that shows the total score for each movie and the movie that had the highest total score.

Section 9.4 of our textbook discusses two-dimensional arrays. Section 9.4.2 discusses Base-Index Operands and even contains an example of how to calculate a row sum for a two-dimensional array. Chapter 11 contains an example program named ReadFile.asm that will show you how to prompt the user for a file name, open a file, read its contents, and close the file when you are done. Look in section 11.1.8, Testing the File I/O Procedures. Each record in a text file is terminated by the two characters, Carriage Return (0Dh) and Line Feed (0Ah). Assume that you wish to process a text file named reviews.txt that is stored on the C: drive in the Data folder. If you are using a Windows computer, you have two ways to identify the path to the files location:

C:/Data/reviews.txt OR C:\\Data\ eviews.txt

Double backslash characters (\) are needed because a single backslash is defined as being the first part of an escape sequence such as newline ( ).

reviews.txt

D,84,2 A,90,3 A,87,4 B,35,4 B,100,1 C,75,1 D,84,1 B,87,2 A,0,2 C,25,2 D,45,3 E,35,3 A,90,1 B,100,3 C,75,3 E,35,1 C,78,4 E,35,2 D,100,4 E,0,4

This code can be used to load a reviewers score into the array of movie reviews:

; Insert score at reviews[rowIndex][colIndex]

mov edx,rowSize ; row size in bytes

mov eax,rowIndex ; row index

mul edx ; row index * row size

mov index,eax ; save row index * row size

mov eax,colIndex ; load col index

shl eax,2 ; eax = colIndex * 4

add eax,index ; eax contains offset

mov edx,score ; edx = reviewer's score

mov ebx,OFFSET reviews ; array of review scores

mov [ebx + eax],edx ; Store score for movie

Section 9.4 of your textbook deals with two-dimensional arrays. There is even an example showing how to calculate a row sum. You may be able to adapt this example to calculate a column sum.