Exception thrown: read access violation.**this** was 0xFFFFFFFFFFFFFFDF.

[jolly anvil]

I keep getting this error in my print statement

void Student::print() {
    cout << getStudentID() << "\t";
    cout << "First Name: " << getFirstName() << "\t";
    cout << "Last Name: " << getLastName() << "\t";
    cout << "Email Address: " << getEmailAddress() << "\t";
    cout << "Age:\t" << age << "\t";
    cout << "DaysInCourse: {" << getDaysToCompleteEachCourse()[0] << ", " << getDaysToCompleteEachCourse()[1] <<
        ", " << getDaysToCompleteEachCourse()[2] << "} ";
    cout << "Degree Program: " << convertEnumToString(getDegreeProgram()) << endl;

I stepped through on the debugger and it seems to happen from any getter method accessed in this function

string Student::getStudentID() {
    return this->studentID;
}

[normal spire]

When your question is answered use !solved to mark the question as resolved.

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[marsh oasis]

gonna need to see more code

[jolly anvil]

Should I just paste all the files?

[marsh oasis]

just paste the relevant code from the stack trace

toss a breakpoint where it's crashing

also worth asking: is the Student dynamically allocated, stack allocated, etc. Have you ensured the object that you're calling print on is valid, etc

[jolly anvil]

main.cpp
int main()
{
    const string studentData[] =

    { "A1,John,Smith,John1989@gm ail.com,20,30,35,40,SECURITY",
        "A2,Suzan,Erickson,Erickson_1990@gmailcom,19,50,30,40,NETWORK",
        "A3,Jack,Napoli,The_lawyer99yahoo.com,19,20,40,33,SOFTWARE",
        "A4,Erin,Black,[e-mail],22,50,58,40,SECURITY",
        "A5,Sample,Sample,[e-mail],20,10,15,20,SOFTWARE" };


    Roster classRoster;
    for (int a = 0; a < 5; a++) {
        string data = studentData[a];
        int start = 0;
        int end = data.find(',');

        string studentInfo[9];
        for (int i = 0; i < 9; ++i) {
            studentInfo[i] = data.substr(start, end - start);
            start = end + 1;
            end = data.find(',', start);
        }

        string studentID = studentInfo[0];
        string firstName = studentInfo[1];
        string lastName = studentInfo[2];
        string emailAddress = studentInfo[3];
        int age = stoi(studentInfo[4]);
        int daysInCourse1 = stoi(studentInfo[5]);
        int daysInCourse2 = stoi(studentInfo[6]);
        int daysInCourse3 = stoi(studentInfo[7]);
        DegreeProgram degreeProgram;

        string degreeProgramStr = studentInfo[8];
        if (degreeProgramStr == "SECURITY") {
            degreeProgram = SECURITY;
        }
        else if (degreeProgramStr == "NETWORK") {
            degreeProgram = NETWORK;
        }
        else if (degreeProgramStr == "SOFTWARE") {
            degreeProgram = SOFTWARE;
        }
        classRoster.add(studentID, firstName, lastName, emailAddress, age, daysInCourse1, daysInCourse2, daysInCourse3, degreeProgram);
    }
    
    classRoster.printAll();

so this is main

void Roster::add(string studentID, string firstName, string lastName,
    string emailAddress, int age, int daysInCourse1,
    int daysInCourse2, int daysInCourse3, DegreeProgram degreeProgram) {

    int daysForEachCourse[3];
    daysForEachCourse[0] = daysInCourse1;
    daysForEachCourse[1] = daysInCourse2;
    daysForEachCourse[2] = daysInCourse3;
    Student* student = new Student(studentID, firstName, lastName,
        emailAddress, age, daysForEachCourse, degreeProgram);
    for (int i = 0; i < 5; i++) {
        if (classRosterArray[i] == nullptr) {
            classRosterArray[i] = student;
            break;
        }
    }
}

here is my add method

classRosterArray is an array of pointers

Student * classRosterArray[];

void Roster::printAll() {
    for (int i = 0; i < 5; i++) {
        if (classRosterArray[i] != nullptr) {
            cout << classRosterArray[i];
            classRosterArray[i]->print();
        }
    }
}

In my print all here, I tried to print the address of the student pointer and it's CCCCCCCCCCCCCCCC

But when I print the pointers in my add method, they all seem to be good

I feel like im not adding the student pointer to the array correctly

[bright wren]

for (int i = 0; i < 5; i++) {
        if (classRosterArray[i] == nullptr) {
            classRosterArray[i] = student;
            break;
        }
    }

more precisely, this line

if (classRosterArray[i] == nullptr)

will always fail, becouse of the fact that the array is filled with CCCCC+..., make sure to zero out everything in the constructor, or dont use debug mode

also the potential reason for the crash might be the same

if (classRosterArray[i] != nullptr) {
            cout << classRosterArray[i];
            classRosterArray[i]->print();
        }

when trying to access the pointers

if (classRosterArray[i] != nullptr)

it will pass the if becouse instead of being nullptr(default), it will be 0xCCCCCCCCCCC+..., which is the default null that MSVC uses in debug mode

[jolly anvil]

That fixed it

thank you so much

[normal spire]

@jolly anvil Has your question been resolved? If so, type !solved :)

[jolly anvil]

!solved