// This program will read in a group of test scores (positive integers from 1 to 100)
// from the keyboard and then calculate and output the average score
// as well as the highest and lowest score. There will be a maximum of 100 scores.

// fathi mohamed fathi rezq bekhit

#include <iostream>
using namespace std;

typedef int GradeType[100];		// declares a new data type:
GradeType grades;								// an integer array of 100 elements

float findAverage(const GradeType, int);	// finds average of all grades 
int  findHighest(const GradeType, int);		// finds highest of all grades 
int  findLowest(const GradeType, int);		// finds lowest of all grades

int main()
{
	GradeType grades;	// the array holding the grades. 
	int numberOfGrades;	// the number of grades read.
	int pos;			// index to the array.
	float avgOfGrades;	// contains the average of the grades. 
	int highestGrade;	// contains the highest grade.
	int lowestGrade;	// contains the lowest grade.

	// Read in the values into the array 
	pos = 0;
	cout << "Please input a grade from 1 to 100, (or -99 to stop)" << endl;
	cin >> grades[pos];

	while (grades[pos] != -99) {
	int check;
	pos++;// Fill in the code to read the grades
	cout << "Please input a grade from 1 to 100, (or -99 to stop)" << endl;
	cin >> grades[pos];
				
	}

	numberOfGrades = pos;	// Fill blank with appropriate identifier

	findAverage(grades, numberOfGrades);// call to the function to find average
	avgOfGrades = findAverage(grades, numberOfGrades);

	cout << endl << "The average of all the grades is " << avgOfGrades << endl;

	highestGrade=findHighest(grades, numberOfGrades);		// finds highest of all grades // Fill in the call to the function that calculates highest grade

	cout << endl << "The highest grade is " << highestGrade << endl;

	lowestGrade=findLowest(grades, numberOfGrades);// Fill in the call to the function that calculates lowest grade
	cout << endl << "The lowest grade is " << lowestGrade << endl;// Fill in code to write the lowest to the screen

	return 0;
}

//********************************************************************************
// findAverage
//
// task:	      This function receives an array of integers and its size.
//	              It finds and returns the average of the numbers in the array
// data in:	      array of floating point numbers
// data returned: average of the numbers in the array
//
//********************************************************************************

float findAverage(const GradeType	array, int size)
{
	float sum = 0;			// holds the sum of all the numbers

	for (int pos = 0; pos < size; pos++)
	sum = sum + array[pos];

	return (sum / size);	// returns the average
}

//****************************************************************************
// findHighest
//
// task:	      This function receives an array of integers and its size.
//	              It finds and returns the highest value of the numbers in 
//                the array
// data in:	      array of floating point numbers
// data returned: highest value of the numbers in the array
//
//****************************************************************************

int	findHighest(const GradeType array, int size)
{
	int highest=0;// Fill in the code for this function
	for(int count=0;count<size;count++)
	{
		
	if(highest<=array[count])  {
	highest=array[count];
	}
	
	}
	return highest;
}

//****************************************************************************
// findLowest
//
// task:	      This function receives an array of integers and its size.
//	              It finds and returns the lowest value of the numbers in 
//                the array
// data in:	      array of floating point numbers
// data returned: lowest value of the numbers in the array
//
//****************************************************************************

int	findLowest(const GradeType array, int size)
{
	int lowest;// Fill in the code for this function
	int count=0;
	lowest=array[count];
	for(;count<size;count++)
	{
	if(array[count]<=lowest)	{
	lowest=array[count];
	}
	}
	return lowest;
}

//Lab 7.1 ex 2 output:
//The average of all the grades is 67.5

//The highest grade is 90

//The lowest grade is 45