//chapter 7 lab p475 ex8 gradebook 
//Intructions:
//A teacher has five students who have taken four tests.
//The teacher uses the following grading scale to assign a letter 
//grade to a student, based on the average of his or her test scores.
//___________________________________
//	Test Score	Letter Grade
//-----------------------------------
//	90-100		A
//	80-89		B
//	70-79		C
//	60-69		D
//	0-59		F
//___________________________________
//Write a program that uses a two-dimensional array of charachters
//that hold the five student names, a single-dimensional array of 
//five characters to hold the five students' letter grades, and five
//single-dimensional arrays of four doubles to hold each student's 
//set of test scores.
//The program should allow the user to enter each student's name and
//his or her scores. It should then calculate and display each 
//student's average test score and a letter grade based on that average.
//Imput Validation: Do not accept test scores less than zero or greater
//than 100.
 
#include <iostream> 
using namespace std; 
 
//function prototype
void calcdata(double []);
void display data();
 
 
//start of main
int main() 
{ 
 
const int NUM_NAMES = 5;          //how many occurances 
const int NAMESIZE = 11;          //how long names can be, 10 letters 
const int NUM_TESTS = 4;          //how many tests 
char name[NUM_NAMES][NAMESIZE];   //two-dimensional name array 
char grade[NUM_NAMES];            //grade for each student array 
double average[NUM_NAMES];        //average for each student array
double student1[NUM_TESTS] 	  //student1 array
double student2[NUM_TESTS] 	  //student2 array
double student3[NUM_TESTS] 	  //student3 array
double student4[NUM_TESTS] 	  //student4 array
double student5[NUM_TESTS] 	  //student5 array
 
 
cout << “Enter the student’s name� 
for (int count = 0; count < NUM_NAMES; count++)
 
{ // beginning of nested for loop
	cout << "Student"   << (count +1) <<": "; 
	cin >> name[count];
 
	for (i = 0; i < NUM_NAMES; i++)
	cout >> name [i];              //stub statement
} //end of for loop 
 
//Beginning of validation sequence taken from chapter 6 lab assignment
//********Need to change to fit with this lab assignment********
 
cout << "Please enter test 1, with scores between 0 and 100.\n"; 
cin >> val1; 
while (val1 < 0 || val1 > 100) 
{ 
cout << "You have not entered a number between 0 and 100. Please re-enter test 1.\n"; 
cin >> val1; 
}//end of while loop 
 
cout << "Please enter test 2, with scores between 0 and 100.\n"; 
cin >> val1; 
while (val2 < 0 || val2 > 100) 
{ 
cout << "You have not entered a number between 0 and 100. Please re-enter test 2.\n"; 
cin >> val2; 
}//end of while loop 
 
cout << "Please enter test 3, with scores between 0 and 100.\n"; 
cin >> val1; 
while (val3 < 0 || val3 > 100) 
{ 
cout << "You have not entered a number between 0 and 100. Please re-enter test 3.\n"; 
cin >> val3; 
}//end of while loop 
 
cout << "Please enter test 4, with scores between 0 and 100.\n"; 
cin >> val4; 
while (val4 < 0 || val4> 100) 
{ 
cout << "You have not entered a number between 0 and 100. Please re-enter test 4.\n"; 
cin >> val4; 
}//end of while loop 
 
cout << "Please enter test 5, with scores between 0 and 100.\n"; 
cin >> val5; 
while (val5 < 0 || val5 > 100) 
{ 
cout << "You have not entered a number between 0 and 100. Please re-enter test 5.\n"; 
cin >> val5; 
}//end of while loop 
 
//display output for validation
cout << "Test 1 is: " << val1 << endl;
cout << "Test 2 is: " << val2 << endl;
cout << "Test 3 is: " << val3 << endl;
cout << "Test 4 is: " << val4 << endl;
cout << "Test 5 is: " << val5 << endl; 
 
 
//call to function calcdata 
calcdata();
 
 
 
return 0; 
} //end of main
 
//************************************************
//function definition of calcdata 
// this function is going to get the test scores
// array and calculate the averages
// and calculate grade 
//i need to pass the student names to correspond
// with the test scores, avgs, and grade 
//************************************************
void calcdata()
 
const int NUM_STUDENTS = 5;
const int NUM_SCORES = 4;
double total, average;
double scores[NUM_STUDENTS][NUM_SCORES];
 
//get each students average score
for (int row = 0; row < NUM_STUDENTS; row++)
{
	//set the accumulator.
	total = 0;
 
	//sum a row
	for (int col = 0; col < NUM_SCORES; col++
		total += scores[row][column];
 
	//get the average
	average = total / NUM_SCORES;
 
	//
 
//**************************************************
// loop used to determine grade for each students average
//for (int index = 0; index < NUM_NAMES; index++)
//nested loop
//for (int count =0; index < NUM_NAMES; count++)
 
 
if (average[0] < 60) 
grade[0] = ‘F’ 
else if (average [0] < 70) 
grade[0] = ‘D’ 
else if (average [0] < 80) 
grade[0] = ‘C’ 
else if (average [0] < 90) 
grade[0] = ‘B’ 
else (average [0] <= 100) 
grade[0] = ‘A’ 
 
if (average[1] < 60) 
grade[1] = ‘F’ 
else if (average [1] < 70) 
grade[1] = ‘D’ 
else if (average [1] < 80) 
grade[1] = ‘C’ 
else if (average [1] < 90) 
grade[1] = ‘B’ 
else (average [1] <= 100) 
grade[1] = ‘A’ 
 
if (average[2] < 60) 
grade[2] = ‘F’ 
else if (average [2] < 70) 
grade[2] = ‘D’ 
else if (average [2] < 80) 
grade[2] = ‘C’ 
else if (average [2] < 90) 
grade[2] = ‘B’ 
else (average [2] <= 100) 
grade[2] = ‘A’ 
 
if (average[0] < 60) 
grade[3] = ‘F’ 
else if (average [3] < 70) 
grade[3] = ‘D’ 
else if (average [3] < 80) 
grade[3] = ‘C’ 
else if (average [3] < 90) 
grade[3] = ‘B’ 
else (average [3] <= 100) 
grade[3] = ‘A’ 
 
if (average[0] < 60) 
grade[4] = ‘F’ 
else if (average [4] < 70) 
grade[4] = ‘D’ 
else if (average [4] < 80) 
grade[4] = ‘C’ 
else if (average [4] < 90) 
grade[4] = ‘B’ 
else (average [4] <= 100) 
grade[4] = ‘A’ 
 
//call to function displaydata
displaydata();
 
return 0;
}//end of function calc data 
 
 
//***************************************************
//definition of function displaydata
//this function is designed to display the student's
// average and letter grade
//***************************************************
void displaydata() 
 
for (int i = 0; i < NUM_SIZE; i++) 
cout << "Student: " <<name [i] 
       <<"average: " << average [i] 
       <<"grade: " << grade [i] 
       << endl; 
 
 
 
return 0; 
} // end of main