function and file data

Write a C++ program that will calculate student grades up to 2 decimal positions after any whole

numbers for rounding purposes.

a. Create the following input file and call it Lab7inpt.dat

Student # Test 1 Test2 Labs Final

111 70 80 90 98

222 90 80 77 65

333 100 95 80 90

444 67 60 75 70

555 88 69 85 71

666 78 98 82 77

777 45 56 67 60

888 70 89 88 75

999 85 90 81 80

100 55 75 93 95

200 93 71 75 82

300 76 93 87 98

b. Do not put the first line shown above here in the file

You should read the input file until EOF is reached and count how many records you read in. This count will be needed for statistical calculations later on in this lab.

Write a function that will calculate a final number grade using the formula:

Final Number Grade = (0.20 * Test 1) + (0.20 * Test 2) +

(0.35 * Labs) + (0.25 * Final Exam)

Write another function that will determine the final letter grade based on each final number grade. A final letter grade is based on the following ranges: 90 - 100 = A, 80 - 89 = B, 70 - 79 = C, 60 - 69 = D, less than 60 = F.

f. Write another function to print all student information including new columns for the final numeric grade and the final letter grade.

Write a function that will determine the statistical mean (which is a standard average

based on how many records were counted when they were read in) from the data in the final number grades and place the results of this calculation as the last line of the above generated report file. Put an appropriate subheading to describe what the value calculated represents.

h. Points to remember:

(1) You will have to determine what variables to pass by value and what

variables to pass by reference.

Remember that functions can call other functions!

Global variables CANNOT BE USED in this lab assignment.