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/* Beau Bruemmer
Assignment - Program 3 - C++
Due date - 10/17/14 */
#include "stdafx.h"
#include <iostream> // Allows program to perform input and output.
#include <iomanip> // Used to manipulate data values using setprecision to 2 decimals
using namespace std; // allows using cin and cout rather then std::cin and std::cout.
/* Function and template pre-loading*/
template <class Avg>
Avg Average(Avg Grade1,Avg Grade2,Avg Grade3);
char printLetterGrade(double AvgGrade);
double avg(double* ary, double SIZE);
double max(double* ary, double SIZE);
double min(double* ary, double SIZE);
int main()
{
/*Variable declaration*/
double Students;
double LtrGrd;
double Grade1;
double Grade2;
double Grade3;
double AvgValue = 0;
int StudentNumber = 1;
int x = 0;
int y = 0;
/*Requests User data of how many students using an If statement to request new data if input is over the limit of 30*/
cout << "Enter the number of students in class: ";
cin >> Students;
if (Students > 30)
{
cout << "Maximum number of students allowed is 30.\n";
cout << "Enter the number of students in class: ";
cin >> Students;
}
/*Initializing maximum array sizes based on parameter of maximum 30 students*/
int Grades[90];
double Avgs[30];
/*Input Loop - Loop used to gather requested data from user and stores values in array "Grade".
Loop uses input variables to calculate values for array "Avgs"*/
for (int n = 1; n <= Students; n++){
cout << "Please enter three numeric grades for student number " << StudentNumber++ << ". ";
cin >> Grade1;
Grades[x++] = Grade1;
cin >> Grade2;
Grades[x++] = Grade2;
cin >> Grade3;
Grades[x++] = Grade3;
Avgs[y++] = Average(Grade1, Grade2, Grade3);
cout << endl;
}
/*output Look - Used to return data from arrays in structured forum that is readable by user.
Loop uses if statements to create Visual structure of output.*/
x = 0 ;
y = 0 ;
for (int n = 1; n <= Students; n++){
if (n <= 1){
cout << "StudentNumber\t" "Grade1\t" "Grade2\t" "Grade3\t" "Average\t" "LetterGrade\n";
cout << "===========================================================" << endl;
}
cout << "\t" << n << "\t" << Grades[x++] << "\t" << Grades[x++] << "\t" << Grades[x++] << "\t" << setprecision(2) << fixed << (LtrGrd = Avgs[y++]) << '\t';
cout << printLetterGrade(LtrGrd) << '\t' << endl;
if (n == Students)
cout << "===========================================================" << endl;
}
/*Data outputs using array "Avgs" with functions avg, max, min.
Precision values set to improve readablity*/
cout << "Processed: " << setprecision(0) << fixed << Students << " Students." << endl;
cout << "Class Average: " << setprecision(2) << fixed << avg(Avgs, Students) << endl;
cout << "Class highest average: " << max(Avgs, Students) << endl;
cout << "Class least average: " << min(Avgs, Students) << endl;
cout << endl;
/*System Pause until for any key before returning of 0 to exit*/
system("PAUSE");
return 0;
exit(1);
}
/*Function template to take input grades per student from input loop and average the values.
Value is returned and stored in "Avgs" array for use in min/max function and output loop*/
template <class Avg>
Avg Average(Avg Grade1 ,Avg Grade2 ,Avg Grade3){
Avg GradeAvg = ((Grade1 + Grade2 + Grade3) / 3);
return GradeAvg;
}
/*Function to Take Average of grade input per student from input loop and determines
the corresponding letter grade. Function returned in output loop*/
char printLetterGrade(double AvgGrade){
int LetterGrade;
if (AvgGrade >= 90) // Grades 90 and above as "A"
LetterGrade = 'A';
else
if (AvgGrade >= 80) // Grades 80-89 as "B"
LetterGrade = 'B';
else
if (AvgGrade >= 70) // Grades 70-79 as "C"
LetterGrade = 'C';
else
if (AvgGrade >= 60) // Grades 60-69 as "D"
LetterGrade = 'D';
else // Grades 59 and less as "F"
LetterGrade = 'F';
return LetterGrade;
}
/*Function to find minimum value within array "Avgs"*/
double min(double* ary, double SIZE){
double min = 100;//Init to max value
for (int i = 0; i < SIZE; i++)
if (ary[i] < min)
min = ary[i];
return min;
}
/*Function to find maximum value within array "Avgs"*/
double max(double* ary, double SIZE){
double max = 0;//Init to min value
for (int i = 0; i < SIZE; i++)
if (ary[i] > max)
max = ary[i];
return max;
}
/*Function to calculate total class average using array "Avgs"*/
double avg(double* ary, double SIZE){
double avg = 0;
for (int i = 0; i < SIZE; i++)
avg += ary[i];
avg = avg / SIZE;
return avg;
}
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