Universal Grade Calculator
main.cpp
/**Universal Grade Calculator by Austin Metzner*/
#include <iostream>
#include <istream>
#include "classGrade.h"
using namespace std;
int main()
{
cout << "Welcome to the Universal Grader!" << endl;
classGrade *myClass = new classGrade;
string userInput;
while(userInput != "10"){
cout<<"======Main Menu====="<<endl;
cout<<"1. Add a class"<<endl;
cout<<"2. Calculate class grade"<<endl;
cout<<"3. Print grades"<<endl;
cout<<"4. Best and worst section"<<endl;
cout<<"5. Minimum grade (on final) to pass"<<endl;
cout<<"6. Change grade"<<endl;
cout<<"7. Delete class"<<endl;
cout<<"8. Minimum grade (on final) to receive A"<<endl;
cout<<"9. Minimum grade (on final) to receive grade of your choice"<<endl;
cout<<"10. Quit"<<endl<<endl<<"~~";
getline(cin,userInput);
//OPTION 1 ADD A NEW CLASS
if(userInput == "1"){
//classGrade *myClass = new classGrade;
myClass->addClass();
}
//OPTION 2 CALCULATE GRADE
else if(userInput == "2"){
myClass->totalGrades();
}
//OPTION 3 PRINT GRADES
else if(userInput == "3"){
myClass->printGrades();
}
//OPTION 4 Best and worst sections
else if(userInput == "4"){
myClass->bestNworst();
}
//OPTION 5 MINIMUM GRADE ON FINAL TO PASS
else if(userInput == "5"){
myClass->min2pass();
}
//OPTION 6 Change GRADE
else if(userInput == "6"){
myClass->changeGrade();
}
//OPTION 7 DELETE CLASS
else if(userInput == "7"){
myClass->deleteClass();
}
//OPTION 8 MINIMUM GRADE ON FINAL TO EARN A
else if(userInput == "8"){
myClass->min2A();
}
//OPTION 8 MINIMUM GRADE ON FINAL TO EARN A GRADE OF USER'S CHOICE
else if(userInput == "9"){
myClass->min2grade();
}
}
cout<<"Later alligator"<<endl;
delete myClass;
return 0;
}
classGrade.cpp
#include "classGrade.h"
#include <iostream>
#include <istream>
using namespace std;
classGrade::classGrade()
{
head = NULL;
tail = NULL;
}
classGrade::~classGrade()
{
this->deleteClass();
}
Section* classGrade::getSectionInfo(Section *node)//Gets section info Checks if section weight entered is less than one
{
cout<<"Enter name of section: ";
getline(cin, node->section);
double x = -1;
while(0 >= x || x > 1)
{
cout<<"Enter section weight (0-1.00): ";
cin>>x; cin.ignore();
if( x>0 && x<=1)
{
node->sectionWeight = x;
break;
}
}
int y = -1;
while(0 > y)
{
cout<<"Enter number of grades in section: ";
cin>>y; cin.ignore();
if(y >=0)
{
node->numGrades = y;
break;
}
}
node->sectionGrades = new double[node->numGrades]; //Creates array for grades for this section
return node;
}
Section* classGrade::validGrade(Section *node, int i)//makes sure grade entry is from 0-100
{
double x = -1;
while(0 > x || x > 100)
{
cout<<"Enter "<<node->section<<" grade "<<(i+1)<<": ";
cin>>x; cin.ignore();
if(x>0 && x<=100)
{
node->sectionGrades[i] = x;
node->gradeSum += node->sectionGrades[i];
return node;
}
}
return node;
}
Section* classGrade::getAvg(Section *node)//calculates section average
{
node->avgGrade = (node->gradeSum/node->numGrades);//Getting Section Average and weighted grade
node->weightSum = node->sectionWeight*node->avgGrade;
return node;
}
void classGrade::deleteClass()
{
Section *current = head;
Section *tmp = new Section;
if(current != NULL)
{
cout<<"Deleting "<<this->className<<endl;
while(current != NULL)
{ // Runs until all are deleted
tmp = current->next;
cout<<"Deleting "<<current->section<<endl;
delete current;
current = tmp;
}
head = NULL;
}
delete current;
cout<<"Class successfully deleted"<<endl;
}
void classGrade::addClass()
{
cout<<"===ADDING CLASS==="<<endl;
//Establishing class
cout<<"Enter name of class: ";
getline(cin, this->className);
cout<<"The final is by default the last section included in the section count"<<endl;
cout<<"Enter number of sections: ";
cin>>this->numSections; cin.ignore(); cout<<endl;
//Establishing each section and grades
Section* first = new Section;//Instating head as first section of class
double finalWeight = 0;//used to calculate weight of final automatically
first = getSectionInfo(first);
for(int i = 0; i < first->numGrades; i++)//Inputting grades
{
first = validGrade(first, i);
}
first = getAvg(first);
finalWeight += first->sectionWeight;
cout<<"Section average: "<<first->avgGrade<<endl; cout<<endl;
head = first;
Section *current = head;//sets values of each section after head
for(int i = 1; i < this->numSections-1; i++)
{
Section *tmp = new Section;
tmp = getSectionInfo(tmp);
for(int i = 0; i < tmp->numGrades; i++)
{
validGrade(tmp, i);
}
tmp = getAvg(tmp);
finalWeight += tmp->sectionWeight;
cout<<"Section average grade: "<<tmp->avgGrade<<endl; cout<<endl;
current->next = tmp;
current = current->next;
}
//The final
Section *final = new Section;
current->next = final;
if(finalWeight >= 1)
{
cout<<"Section weight sum must be less than 1"<<endl;
return;
}
final->section = "Final"; final->sectionGrades = new double[1]; final->numGrades = 1;
string answer;
while(answer != "y" && answer != "n")
{
final->sectionWeight = 1 - finalWeight; //automatically determines weight of final
cout<<"Have you taken the final? (y/n) ";
getline(cin, answer);
if(answer == "y")
{
cout<<"What was your score? ";
cin>>final->gradeSum; cin.ignore();
final->sectionGrades[0] = final->gradeSum;
final = getAvg(final);
this->finalTaken = true;
break;
}
else if (answer == "n") break;
}
tail = final; cout<<endl;
}
void classGrade::printGrades()
{
Section *current = head;
cout<<"===PRINTING GRADES==="<<endl;
cout<<endl;
while(current != NULL)
{
if(current == tail && this->finalTaken == false)
{
cout<<"Final has not been taken ~"<<endl;
break;
}
else
{
cout<<"Name of section: "<<current->section;
cout<<" | Section weight: "<<current->sectionWeight;
cout<<" | Number of grades: "<<current->numGrades<<endl;
for(int i = 0; i < current->numGrades; i++)
{
if(i == 0)
cout<<current->section<<" "<<(i+1)<<": ";
else
cout<<" | "<<current->section<<" "<<(i+1)<<": ";
cout<<current->sectionGrades[i];
}
cout<<endl;
cout<<"Average grade in this section: "<<current->avgGrade;
cout<<" | Weighted grade: "<<current->weightSum<<endl<<endl;
current = current->next;
}
}
cout<<"=================="<<endl;
cout<<endl;
}
void classGrade::totalGrades()//Calculates current or final grade
{
cout<<endl;
cout<<"===CALCULATING CLASS GRADE==="<<endl<<endl;
if(this->finalTaken == true)
{
Section *current = head;
double finalGrade = 0; //Current grade is weighted Averages divided by combined weights of classes thus far
while(current != NULL)
{
finalGrade += current->weightSum;
current = current->next;
}
cout<<"Your grade in "<<this->className<<" is: "<<finalGrade<<endl<<endl;
}
else//If final not taken
{
Section *current = head;
double currentSum,currentWeight = 0; //Current grade is weighted Averages divided by combined weights of classes thus far
while(current != tail)
{
currentSum += current->weightSum;
currentWeight += current->sectionWeight;
current = current->next;
}
cout<<"Your grade in "<<this->className<<" thus far is: "<<(currentSum/currentWeight)<<endl;
} cout<<endl;
}
void classGrade::bestNworst()//Calculates best and worst section
{
cout<<"===BEST AND WORST SECTIONS==="<<endl;
Section *current = head;
Section *worstSection = new Section; Section *bestSection = new Section;
double worstGrade = 99999; double bestGrade = -1;
while(current != NULL)
{
if(current == tail)
{
if(this->finalTaken == false)
break;
}
if(current->avgGrade > bestGrade)
{
bestGrade = current->avgGrade;
bestSection = current;
}
if(current->avgGrade < worstGrade)
{
worstGrade = current->avgGrade;
worstSection = current;
}
current = current->next;
}
cout<<"Your best section in "<<this->className<<" is '"<<bestSection->section<<"' with an average grade of: ";
cout<<bestSection->avgGrade<<endl;
cout<<"Your worst section in "<<this->className<<" is '"<<worstSection->section<<"' with an average grade of: ";
cout<<worstSection->avgGrade<<endl; cout<<endl;
}
void classGrade::min2pass()//Minimum grade on final needed to pass
{
cout<<endl;
cout<<"===MINIMUM GRADE ON FINAL TO PASS==="<<endl;
if(this->finalTaken == true)
{
cout<<"This operation calculates the minimum score the user needs to pass this class"<<endl;
cout<<"The final exam must not have been taken in order to access the function ~"<<endl<<endl;
return;
}
else//If final not taken
{
Section *current = head;
double currentGrade = 0; double grade2pass = 0;
while(current != tail)
{
currentGrade += current->weightSum;
current = current->next;
}
grade2pass = (60 - currentGrade)/tail->sectionWeight;
cout<<"Assuming a 60 is the deciding point of failure or not..."<<endl;
cout<<"You need a minimum score of "<<grade2pass<<" on the final in order to pass "<<this->className<<endl;
if(grade2pass >= 80)
cout<<"Good luck ~"<<endl;
}
cout<<endl;
}
void classGrade::min2A()//Minimum grade on final needed to pass
{
cout<<endl;
cout<<"===MINIMUM GRADE ON FINAL TO GET AN -A- IN THE CLASS==="<<endl;
if(this->finalTaken == true)
{
cout<<"This operation calculates the minimum score the user needs to pass this class"<<endl;
cout<<"The final exam must not have been taken in order to access the function ~"<<endl<<endl;
return;
}
else//If final not taken
{
Section *current = head;
double currentGrade = 0; double grade2pass = 0;
while(current != tail)
{
currentGrade += current->weightSum;
current = current->next;
}
grade2pass = (90 - currentGrade)/tail->sectionWeight;
cout<<"Assuming a 90 is the deciding point of an -A- or not..."<<endl;
cout<<"You need a minimum score of "<<grade2pass<<" on the final in order to get an A "<<this->className<<endl;
if(grade2pass >= 85)
cout<<"Good luck ~~"<<endl;
}
cout<<endl;
}
void classGrade::min2grade()//Minimum grade on final needed to pass
{
cout<<endl;
bool good = false;
string grade;
int percent = 0;
while (good == false){
cout<< "Please enter your desired grade from the following: A, B, C, or D."<<endl;
cin>>grade; cin.ignore();
if (grade == "A" || grade == "a"){
percent = 90;
good = true;
}else if (grade == "B" || grade == "b"){
percent = 80;
good = true;
}else if (grade == "C" || grade == "c"){
percent = 70;
good = true;
}else if (grade == "D" || grade == "d"){
percent = 60;
good = true;
}
}
cout<<"===MINIMUM GRADE ON FINAL TO GET A(N) "<<grade<<" IN THE CLASS==="<<endl;
if(this->finalTaken == true)
{
cout<<"This operation calculates the minimum score the user needs to pass this class"<<endl;
cout<<"The final exam must not have been taken in order to access the function ~"<<endl<<endl;
return;
}
else//If final not taken
{
Section *current = head;
double currentGrade = 0; double grade2pass = 0;
while(current != tail)
{
currentGrade += current->weightSum;
current = current->next;
}
grade2pass = (percent - currentGrade)/tail->sectionWeight;
cout<<"Assuming a(n) "<<percent<<" is the deciding point of a(n) "<<grade<<" or not..."<<endl;
cout<<"You need a minimum score of "<<grade2pass<<" on the final in order to get a(n) "<<grade<<" in "<<this->className<<endl;
}
cout<<endl;
}
void classGrade::changeGrade()//Lets user change grades of a section
{
cout<<"===CHANGING GRADES==="<<endl;
string input;
while(input != "q")
{
Section *current = head;
cout<<"Enter 'q' to quit editing"<<endl;
cout<<"Which section would you like to edit?... ";
getline(cin, input);
if(input == "q")
return;
while(current != NULL)
{
if(current->section == input)
break;
current = current->next;
}
if(current == NULL)
cout<<"Section name not found"<<endl;
else
{
for(int i = 0; i < current->numGrades; i++)
{
if(i == 0)
cout<<current->section<<" "<<i<<": ";
else
cout<<" | "<<i<<": ";
cout<<current->sectionGrades[i];
} cout<<endl;
int index; //double newGrade;
cout<<"Which grade would you like to change (select number next to grade)?: ";
cin>>index; cin.ignore();
current = updateSectionVal(current, index);
}
}
}
Section* classGrade::updateSectionVal(Section *node, int i)//Updates values of section after changes are made
{
node->gradeSum = 0;
double x = -1;
if (node->section == "Final") //If user wants to update the final it will be marked as taken
this->finalTaken = true;
while(0 > x || x > 100)
{
cout<<"What number would you like to change grade "<<i<<" to?: ";
cin>>x; cin.ignore();
if(x>0 && x<=100)
{
node->sectionGrades[i] = x;
break;
}
}
for(int t = 0; t < node->numGrades; t++)
node->gradeSum += node->sectionGrades[t];
node = getAvg(node);
return node;
}
classGrade.h
#ifndef CLASSGRADE_H
#define CLASSGRADE_H
#include <iostream>
#include <istream>
using namespace std;
struct Section{ //Every class has multiple
string section; //Section name contained within class
double sectionWeight = 0; //Individual section of class weight e.g. HW %30 or .30
int numGrades = 0; //Number of grades in section e.g. 14 HW assignments throughout the semester
double *sectionGrades;//Array of grade entries
double gradeSum = 0; // Sum of Grades of section
double avgGrade = 0; //AVG. GRADE of section
double weightSum = 0; // Avg. Grade X Weight of section
Section *next; //Pointer to next section array
Section(){} // default constructor
};
class classGrade{
private:
Section *head;
Section *tail;
string className; //Name of class e.g. "Data Structures"
int numSections; //Number section
bool finalTaken = false; //Whether or not final will be factored in to current grading process
public:
classGrade(string name, int count);
classGrade();
~classGrade();
Section* getSectionInfo(Section *node);
Section* validGrade(Section *node, int i);
Section* getAvg(Section *node);
void deleteClass();
void addClass();
void printGrades();
void totalGrades();
void bestNworst();
void min2pass();
void min2A();
void changeGrade();
void min2grade();
Section* updateSectionVal(Section *node, int i);
};
#endif // CLASSGRADE_H
