Thread: Student Files

Hello everyone I am currently working on a program that will take a crap load of information from a file and save it to a database within a class.

Essentially i have everything set up correctly except for the hard part... I have to calculate the GPA for a spring semester... if the student is even taking classes in the spring (this is found as to whether or not fGPA.noCo = 0. Calculate that gpa and then average it with the GPA before the semester.

I am having trouble with the

UpdateGPA and GenerateReport functions.

I also have these current compiler errors however I am more worred about the actual task at hand as I can figure out the compiler errors later. Please keep in mind that I am very new at working structs and ESPECIALLY classes. Any help would be great. Thanks so much!

1>------ Build started: Project: hw2, Configuration: Debug Win32 ------
1>Compiling...
1>hw2.cpp
1>c:\users\doug\documents\visual studio 2008\projects\hw2\hw2\hw2.cpp(159) : warning C4101: 'choice' : unreferenced local variable
1>c:\users\doug\documents\visual studio 2008\projects\hw2\hw2\hw2.cpp(222) : error C2668: 'UpdateGPA' : ambiguous call to overloaded function
1> c:\users\doug\documents\visual studio 2008\projects\hw2\hw2\hw2.cpp(99): could be 'void UpdateGPA(StudRecType)'
1> c:\users\doug\documents\visual studio 2008\projects\hw2\hw2\hw2.cpp(93): or 'void UpdateGPA(StudRecType &)'
1> while trying to match the argument list '(StudRecType)'
1>Build log was saved at "file://c:\Users\Doug\Documents\Visual Studio 2008\Projects\hw2\hw2\Debug\BuildLog.htm"
1>hw2 - 1 error(s), 1 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Code:

// Example for reading records from the input files for DB.
#include <iostream>
#include <fstream>
#include <string>
using namespace std;

const int Max_Stud = 30;  //Max. no. of enrolled students

struct NameType
{
	string last;
	string first;
	char middle;
};

struct CourseType 
{
	string name;
	char grade;
	int credits;

};

struct  StudRecType 
{
	string ssno;
	NameType name;
	string tel;
	char gender;
	string level;
	int totalCredit;
	float cumGPA;
	int noCo;
	CourseType course[5];
	int semCredit;
	float semGPA;
};

typedef StudRecType StudDBType[Max_Stud];
	// Type definition for an array of records

class DBType
{
	public: 
		DBType( );
		void Insert(StudRecType );
		bool GetNext(StudRecType &);
		void Reset( );
	private:
		StudDBType Stud;
		int current;
		int nost;
};	

DBType::DBType( )
{
	current = 0;
	nost = 0;
}

void DBType:: Insert(StudRecType  srec)
{
	Stud[current] = srec;
	current ++;
	nost ++;
}

bool  DBType::GetNext (StudRecType & srec)
{
	if(current > nost)
		return false;
	else
	{
		srec = Stud[current];
		current ++;
		return true;
	}
}

void DBType::Reset ( )
{
	current = 0;
}


void Get_Inf (ifstream&, DBType &);

// Function prototype declaration statement for reading data from 
// "Stud.txt"

//You have to implement the following functions// 

void  UpdateGPA(StudRecType &);  // Calculate Sem. GPA and Cum GPA etc…



void  GenerateReports(ofstream &, DBType &);

void UpdateGPA(StudRecType& fGPA)
{
	int count = 0;
	int i = 0;
	float gradeA = 4.0;
	float gradeB = 3.0;
	float gradeC = 2.0;
	float gradeD = 1.0;
	float gradeF = 0.0;

	float heldGPA = 0.0;
	float totalGPA = 0.0;

	count = fGPA.noCo;

	int amtClass = 0;
	
	if (fGPA.noCo != 0)
	{
		for (i = 0; i < count; i++)
		{
			if (fGPA.course[i].grade = 'A')
			{
				heldGPA = gradeA;
				amtClass++;
			}
			if (fGPA.course[i].grade = 'B')
			{			
				heldGPA = gradeB;
				amtClass++;
			}
			if (fGPA.course[i].grade = 'C')
			{
				heldGPA = gradeC;
				amtClass++;
			}
			if (fGPA.course[i].grade = 'D')
			{			
				heldGPA = gradeD;
				amtClass++;
			}
			if (fGPA.course[i].grade = 'F')
			{			
				heldGPA = gradeF;
				amtClass++;
			}
			if (fGPA.course[i].grade = 'W')
				amtClass--;

			totalGPA = (heldGPA + totalGPA);
		}
			fGPA.semGPA = (totalGPA / amtClass);
			fGPA.cumGPA = ((fGPA.semGPA + fGPA.cumGPA) / 2);
	}

}
int main()
{
	ifstream inStud;
	ofstream outFile;
	int	choice;
	DBType StudDB;

	inStud.open("Stud.txt");
	
	if (!inStud)
	{
		cout <<"**Can't open input file Stud**"<< endl;
		return 1;
	}

	outFile.open("Echo.dat");
	if(!outFile)
	{
		cout <<"** Can't open output file **"<< endl;
		return 1;
	}
	Get_Inf(inStud, StudDB);


	//cout << "Total no. of Students is "<<noStud<<endl;
	cout<<endl;
	GenerateReports(outFile, StudDB);
	return 0;
}

//*******************************************************************
void Get_Inf(
	/* in  */ ifstream& 	inF1,
	/* out */ DBType & 	 DB)
{
	int i,j;
	int jco;
	StudRecType SR;

	i=0;
	while(!inF1.eof())
	{
		inF1>>SR.ssno;
		inF1>>SR.name.last>>SR.name.first>>SR.name.middle;
		inF1>>SR.tel>>SR.gender>>SR.level;
		inF1>>SR.totalCredit>>SR.cumGPA;
		
		//Echo input data on the screen
		cout<<SR.ssno<<endl;					
		cout<<SR.name.last<<"*"<<SR.name.first;
		cout<<"*"<<SR.name.middle<<endl;
		cout<<SR.gender<<"*"<<SR.level<<endl;
		cout<<SR.totalCredit<<"*"<<SR.cumGPA<<endl;

		inF1>>jco;
		SR.noCo = jco;
		for (j = 0;j < jco; j++)
		{										
			inF1>>SR.course[j].name;
			inF1>>SR.course[j].credits;
			inF1>>SR.course[j].grade;
			cout<<SR.course[j].name
				<<","<<SR.course[j].credits<<","
				<<SR.course[j].grade<<endl;

		}
		i++;
		UpdateGPA(SR);
		DB.Insert (SR);
		inF1.ignore(100,'\n');
		cin.get();
	}	
}