Thread: Program using classes - keeps crashing

Hello,
I wrote a program using classes to get myself more familar with OOP. I got my program error free, but whenever I run the code, the program crashes. Any hints on why would be greatly appreciated. Thanks.

Code:

#include <iostream>
#include <string>

using namespace std;

class courseTranscript
{
private:
	string dept;
	string courseNum;
	string courseTitle;
	int courseCredit;
	char grade;
public:
	void setDept(string d);
	string getDept(void);
	void setCourseNum(string n);
	string getCourseNum(void);
	void setCourseTitle(string t);
	string getCourseTitle(void);
	void setCourseCredit(int c);
	int getCourseCredit(void);
	void setGrade(char g);
	char getGrade(void);
    
};

class student
{
private:
	string firstName;
	string lastName;
	int studentID;
	string ssn;
	string dob;
	string major;
	courseTranscript transcripts[50];
	int numCourseTaken;
public:
	student();
    student(string fn, string ln, int id, string ssn);
    void setFirstName(string fn);
	string getFirstName(void);
	void setLastName(string ln);
	string getLastName(void);
	void setStudentID(int id);
	int getStudentID(void);
	void setSSN(string ssn);
	string getSSN(void);
	void setDOB(string dob);
	string getDOB(void);
	void setMajor(string m);
	string getMajor(void);
	void setNumCourseTaken(int nct);
	int getNumCourseTaken(void);
	void AddToTranscripts(string d, string n, string t, int c, char g);
	void printTranscript(void);
	void printCourses(void);
	double getGPA();
	courseTranscript getTranscript(int index);
};

class athlete : public student
{
private:
	string sports;
public:
	athlete();
	athlete(string fn, string ln, int id, string ssn, string s);
	void setSports(string s);
	string getSports(void);
    void printTranscript(void);
};

int main(void)
{

	student newstudent;
	student anotherstudent("John", "Smith", 1234, "123-45-6789");
	athlete stu3("Jim", "Smith", 3456, "345-67-8901", "Basketball");

	newstudent.setFirstName("Jane");
	newstudent.setLastName("Smith");
	newstudent.setSSN("234-56-7890");
	newstudent.setStudentID(2345);
	newstudent.setDOB("01/01/1980");
	newstudent.setMajor("Computer Science");
	newstudent.AddToTranscripts("ITS", "2591", "C++ Programming I", 4, 'A');
	newstudent.AddToTranscripts("ITS", "1040", "System Analysis and Designs", 3, 'B');
	newstudent.AddToTranscripts("ITS", "1110", "Programming Logic, Designs, and Development", 3, 'A');
	stu3.AddToTranscripts("ITS", "2591", "C++ Programming I", 4, 'A');
	stu3.AddToTranscripts("ITS", "1040", "System Analysis and Designs", 3, 'B');

	newstudent.printTranscript();
	anotherstudent.printTranscript();
	stu3.printTranscript();

    return 0;
}
// couseTranscript functions
void courseTranscript::setDept(string d)
{
	dept = d;
}
string courseTranscript::getDept(void)
{
	return dept;
}
void courseTranscript::setCourseNum(string n)
{
	courseNum = n;
}
string courseTranscript::getCourseNum(void)
{
	return courseNum;
}
void courseTranscript::setCourseTitle(string t)
{
	courseTitle = t;
}
string courseTranscript::getCourseTitle(void)
{
	return courseTitle;
}
void courseTranscript::setCourseCredit(int c)
{
	courseCredit = c;
}
int courseTranscript::getCourseCredit(void)
{
	return courseCredit;
}
void courseTranscript::setGrade(char g)
{
	grade = g;
}
char courseTranscript::getGrade(void)
{
	return grade;
}

// Student functions
student::student()
{
	firstName = "Jon";
	lastName = "Doe";
	studentID = 0000;
	ssn = "0000-00-0000";
	dob = "00/00/0000";
	major = "Undefined";
	numCourseTaken = 0;
}
student::student(string fn, string ln, int id, string ssn)
{
	firstName = fn;
	lastName = ln;
	studentID = id;
	ssn = ssn;
}
void student::setFirstName(string fn) 
{
	firstName = fn;
}
string student::getFirstName(void) {
	return firstName;
}
void student::setLastName(string ln) 
{
	lastName = ln;
}
string student::getLastName(void)
{
	return lastName;
}
void student::setStudentID(int id)
{
	studentID = id;
}
int student::getStudentID(void)
{
	return studentID;
}
void student::setSSN(string ssn)
{
	ssn = ssn;
}
string student::getSSN(void)
{
	return ssn;
}
void student::setDOB(string dob)
{
	dob = dob;
}
string student::getDOB(void)
{
	return dob;
}
void student::setMajor(string m)
{
	major = m;
}
string student::getMajor(void)
{
	return major;
}
void student::setNumCourseTaken(int nct)
{
	numCourseTaken = nct;
}
int student::getNumCourseTaken(void)
{
	return numCourseTaken;
}
void student::AddToTranscripts(string d, string n, string t, int c, char g)
{
    transcripts[numCourseTaken].setDept(d);
	transcripts[numCourseTaken].setCourseNum(n);
	transcripts[numCourseTaken].setCourseTitle(t);
	transcripts[numCourseTaken].setCourseCredit(c);
	transcripts[numCourseTaken].setGrade(g);

	numCourseTaken++;
}
void student::printTranscript()
{
	cout << "Name     : " << getFirstName() << " " << getLastName() << endl;
	cout << "SSN      : " << getSSN() << endl;
	cout << "DOB      : " << getDOB() << endl;
	cout << "Major    : " << getMajor() << endl;
	cout << "Number of courses taken     : " << getNumCourseTaken() << endl << endl;

    printCourses();
	
}
double student::getGPA()
{
	double gpa;
	double grade;
	double totalpoints = 0;
	double totalcredits = 0;



	for (int i = 0; i < numCourseTaken; i++)
	{
         switch (transcripts[numCourseTaken].getGrade())
		 {
             case 'A':
	         case 'a': grade = 4.0;
		     break;
	         case  'B':
	         case 'b': grade = 3.0;
		     break;
	         case 'C':
	         case 'c': grade = 2.0;
		     break;
	         case 'D':
	         case 'd': grade = 1.0;
		     break;
	         default: grade = 0.0;
		 }
		 totalcredits = totalcredits + transcripts[numCourseTaken].getCourseCredit();
		 totalpoints = totalpoints + (grade * transcripts[numCourseTaken].getCourseCredit());
	}
    gpa = totalpoints / (totalcredits * numCourseTaken);

	return gpa;

}
void student::printCourses(void)
{
	for (int i = 0; i < numCourseTaken; i++)
	{
        cout << "Dept:     " << transcripts[numCourseTaken].getDept() << endl;
	    cout << "Course Num:     " << transcripts[numCourseTaken].getCourseNum() << endl;
	    cout << "Course Title:   " << transcripts[numCourseTaken].getCourseTitle() << endl;
	    cout << "Course Credit:  " << transcripts[numCourseTaken].getCourseCredit() << endl;
	    cout << "Grade:    " << transcripts[numCourseTaken].getGrade() << endl;
	    cout << "GPA:      " << getGPA();
	}
}
courseTranscript student::getTranscript(int index)
{
    return transcripts[index];
}

// Athlete functions
void athlete::setSports(string s)
{
	sports = s;
}
string athlete::getSports(void)
{
	return sports;
}
athlete::athlete() 
{
	sports = "Sports Undefined";
}
athlete::athlete(string fn, string ln, int id, string ssn, string s) : student(fn, ln, id, ssn)
{
	sports = s;

	getTranscript(getNumCourseTaken()).setDept("WFS");
	getTranscript(getNumCourseTaken()).setCourseNum("1050");
	getTranscript(getNumCourseTaken()).setCourseTitle("Coed Team Sports and Activities");
	getTranscript(getNumCourseTaken()).setCourseCredit(1);
	getTranscript(getNumCourseTaken()).setGrade('A');
}
void athlete::printTranscript()
{
    cout << "Name     : " << getFirstName() << " " << getLastName() << endl;
	cout << "SSN      : " << getSSN() << endl;
	cout << "DOB      : " << getDOB() << endl;
	cout << "Major    : " << getMajor() << endl;
	cout << "Number of courses taken     : " << getNumCourseTaken() << endl;
	cout << "STUDENT ATHLETE" << endl << endl; 

   printCourses();
}

oh, int c++ you can initialize like:

Code:

int yourvalue = 0;

Ah, thanks for helping me recognize the problem. I actually never compiled the code. Maybe that's bad practice-I don't know. I just typed it all up, compiled it and eventually got rid of all the errors, and finally ran it.

Now the only problem is getting the outputs correct. Once I intalized numCourseTaken in the constructor, I get werid (garbage) values for certain things.