C++,

I am tried to make this exercise:

2) Write a program and declare an array called “Exam” with 100 integers. Hence, ask a lecturer to enter the number of students in a class along with each student’s mark that should be stored in the array (use a variable n to know the number of students). The program should then calculate and display:
a) the average (float) and the highest and lowest marks of the class,
b) the number of grades A, B, C, D and F, according to the following table.

There is something wrong with the code I just don't understand what it is?
http://pastebin.com/14

Question

C++,

I am tried to make this exercise:


2)	Write a program and declare an array called “Exam” with 100 integers. Hence, ask a lecturer to enter the number of students in a class along with each student’s mark that should be stored in the array (use a variable n to know the number of students). The program should then calculate and display:
a)	the average (float) and the highest and lowest marks of the class,
b)	the number of grades A, B, C, D and F, according to the following table.


There is something wrong with the code I just don't understand what it is?
http://pastebin.com/14