C++程序代写，mergesort 对结构体排序，function pointer

Problem A) (20 Points) Program to compute the numeric grades for a course.

Assume the course records for a particular course are in a file named: “Grades.dat” that will

serve as the input file for your program. The input file is in exactly the following format. Each

line contains a student’s last name, then one space, then the student’s first name, then one

space, then five quiz scores. The quiz numbers are whole numbers and are separated by one

space.

For example, one entry in the file “Grades.dat” is as follows:

Svelt Sam 90 80 90 100 85

Your program will take its input from the file “Grades.dat” its output to a second file named:

“FinalGrades.dat”. The data in the output file will be the same as the data in the input file

except that you will add one additional number at the end of each line. The number will be the

average of the students quiz scores.

For example, the following two entries are in the output file “FinalGrades.dat”:

Svelt Sam 90 80 90 1