// CS2310 Exercise 12
//
// Name ____________________
//
// Chapter 15: p892 - 5
//
// Given the following declaration and code segment, the PtrToMax
// function returns a pointer: the value of p1, p2, or p3, whichever
// points to the struct with the highest value of score. Implement
// the PtrToMax function.
//

#include <iostream>

using namespace std;

struct GradeType {
	int score;
	char grade;
};
typedef GradeType* PtrType;

PtrType PtrToMax( /* in */ PtrType p1,
	              /* in */ PtrType p2,
	              /* in */ PtrType p3 )

	// Precondition:
	//     p1, p2, and p3 point to assigned structs
	// Postcondition:
	//     Function value == p1, p2, or p3, whichever points to the
	//                       struct with the greatest score member

	{
	    PtrType ptrToMax = p1;     // Pointer to struct with max. score

	    // Write the omitted code here.

	    return ptrToMax;
	}

int main() {
	PtrType p1 = new GradeType;
	PtrType p2 = new GradeType;
	PtrType p3 = new GradeType;
	PtrType p4;

	p1->score = 56; p1->grade = 'F';
	p2->score = 67; p2->grade = 'D';
	p3->score = 80; p3->grade = 'B';
	p4 = PtrToMax(p1, p2, p3);
	cout << "The highest score is: " << p4->score << endl;

	p1->score = 56; p1->grade = 'F';
	p2->score = 90; p2->grade = 'A';
	p3->score = 80; p3->grade = 'B';
	p4 = PtrToMax(p1, p2, p3);
	cout << "The highest score is: " << p4->score << endl;

	p1->score = 78; p1->grade = 'C';
	p2->score = 67; p2->grade = 'D';
	p3->score = 75; p3->grade = 'C';
	p4 = PtrToMax(p1, p2, p3);
	cout << "The highest score is: " << p4->score << endl;

	delete p1;
	delete p2;
	delete p3;

	return 0;
}