how do i get a intxt average calculator to compile within c++? Assignment posted below

Programming Assignment #4 Submit Assignment Due Tuesday by 11:59pm Points 100 Submitting a file upload File Types cpp,png, zip, and tgz Available Feb 18 at 12am - Feb 25 at 11:59pm 8 days A continuation of your grading software will be made (you do not need your other code for this assignment). In this one you will intake a students first name and last name from a file called "students.txt". Next, there is a file called grades.txt that contains the grades in a course. There will be three grades for each student in "grades.txt" (see example file bellow). In "student.txt" there are two students first and last names. In "grades.txt" the grades for each student will be on the same line number as the students name was on in "students.txt". So if line 1 of "students.txt" contains: Joe Blow then line 1 of "grades.txt" would contain Joe Blow's grades: 85 54.356 Into an output file called "report.txt" output the student's last name then a comma the their first name. Following this, calculate their average and assign a letter grade using the following scale: 'A': grade >= 90 'B': 90 > grade >= 80 P.80 grade >= 70 name. Following this, calculate their average and assign a letter grade using the following scale: 'A': grade >= 90 'B': 90 > grade >= 80 'C': 80 > grade >= 70 'D': 70 > grade >= 60 'F': grade = 90 'B': 90 > grade >= 80 P.80 grade >= 70 name. Following this, calculate their average and assign a letter grade using the following scale: 'A': grade >= 90 'B': 90 > grade >= 80 'C': 80 > grade >= 70 'D': 70 > grade >= 60 'F': grade