How come I can't print the name in my structure?

Question

I am reading in a file of data with names IDs and grades and I am storing the info in a struc and using a pointer array to store struc addresss. After I am done I am dynamically allocating it to an array and then I want to print the names in all the structs yet nothing prints and there is no error message. How do I print the names in each of the structs in the new dynamic array?

Here is my code below

ifstream inFile;
Student *students[100];

string netID, studentName;
double grade1, grade2, grade3;

inFile.open("Asg3Grades.txt"); //opens the file

int counter = 0;

while(inFile.eof()){
    inFile >> netID >> studentName >> grade1 >> grade2 >> grade3;

    double average = (grade1+grade2+grade3)/3;

    students[counter]->ID=netID;
    students[counter]->name=studentName;
    students[counter]->grade=average;

    counter++;
}

inFile.close(); //closes the file

Student *dynamicStudents = nullptr;
dynamicStudents = new Student[counter];

for (int i=0; i<counter; i++) {
    dynamicStudents[i] = *(students[i]);
}

for (int i=0; i<counter; i++) {
    cout << dynamicStudents[i].name << endl;
}

return 0;

Answer 1

Try something more like this:

ifstream inFile;

Student students[100];
int counter = 0;

string line, netID, studentName;
double grade1, grade2, grade3;

inFile.open("Asg3Grades.txt"); //opens the file

while (getline(inFile, line)) {

    istringstream iss(line);

    if (iss >> netID >> studentName >> grade1 >> grade2 >> grade3) {

        double average = (grade1 + grade2 + grade3) / 3;

        students[counter].ID = netID;
        students[counter].name = studentName;
        students[counter].grade = average;

        if (++counter == 100) break;
    }
}

inFile.close(); //closes the file

Student *dynamicStudents = new Student[counter];

for (int i = 0; i < counter; i++) {
    dynamicStudents[i] = students[i];
}

for (int i = 0; i < counter; i++) {
    cout << dynamicStudents[i].name << endl;
}

delete[] dynamicStudents;

Live Demo

Though, you don't really need the fixed array at all:

ifstream inFile;

Student* students = nullptr;
int counter = 0, capacity = 0;

string line, netID, studentName;
double grade1, grade2, grade3;

inFile.open("Asg3Grades.txt"); //opens the file

while (getline(inFile, line)) {

    istringstream iss(line);

    if (iss >> netID >> studentName >> grade1 >> grade2 >> grade3) {

        double average = (grade1+grade2+grade3)/3;

        if (counter == capacity)
        {
            Student *temp = new Student[capacity + 100];
            for (int i = 0; i < counter; ++i)
                temp[i] = students[i];
            delete[] students;
            students = temp;
            capacity += 100;
        }

        students[counter].ID = netID;
        students[counter].name = studentName;
        students[counter].grade = average;

        ++counter;
    }
}

inFile.close(); //closes the file

for (int i = 0; i < counter; ++i) {
    cout << students[i].name << endl;
}

delete[] students;

Live Demo

Which can be simplified further by using std::vector instead of new[]:

ifstream inFile;
vector<Student> students;

string line, netID, studentName;
double grade1, grade2, grade3;

inFile.open("Asg3Grades.txt"); //opens the file

while (getline(inFile, line)) {

    istringstream iss(line);

    if (iss >> netID >> studentName >> grade1 >> grade2 >> grade3) {

        double average = (grade1+grade2+grade3)/3;

        Student student;
        student.ID = netID;
        student.name = studentName;
        student.grade = average;

        students.push_back(student);
    }
}

inFile.close(); //closes the file

for (size_t i = 0; i < student.size(); ++i) {
    cout << students[i].name << endl;
}

Live Demo