Locate the errors in the following code. You will notice, not every line will co

Question

Locate the errors in the following code. You will notice, not every line will contain a mistake. Pay close attention to the line preceding it. Look out for uninitialized pointers, NULL pointers, pointers to deleted objects, and confusing pointers with objects. Implement a class person with the following fields: A pointer to the persons best friend A popularity counter that indicates how many people have this person as their best friend Write a program that reads in a list of names, allocates a new Peron for every one of them, and places them in a vector. Next, request the name of each best friend for every Person objects. Find the object matching the friend's name, and call a set_best_friend member function to update the pointer and counter. Lastly, print out every Person objects. Labeling the name, best friend, and popularity counter for all. Consider the following classes B and D: Determine the answer by hand, not by compiling and running the program. Implement a base class person. Derive classes Student and Professor from Person. Every Person has will have a name, and birthdate. Every student will have a major, and every professor will have an income. Write the class definitions, the constructors, and the member functions printQ for all classes.

Explanation / Answer

Part A:

2. p=5 is inappropriate way of initializing a value to the pointer.

6. Employee is not initiated before assigning a object ->salary=38000.

Part B:

include <iostream>
using namespace std;

class Person {
    char name[20];
    Person* bestfriend;
public:
    Person (char*,Person*);

};

Rectangle::Rectangle (char[] nm, char[] friend) {
int i=0;
strcpy(name,nm);
strcpy(bestfriend->name,friend);
}

int main () {
Person one ('Rex','Rock');
Person two ('qux','mill');
   return 0;
}

Part C:

Prints

B::B (-3)

D::D (3)

Part D:

// derived classes
#include <iostream>
using namespace std;

class Person {
protected:
    char name[20];
    char birthdate[20];
};

class Professor: public Person {
public:
    double income;
    Professor::Professor(void)
{
    cout << "Professor is being created" << endl;
}

};

class Student: public Person {
public:
    char Major[20];
        Student::Student(void)
{
    cout << "Student is being created" << endl;
}
};

int main () {
Person one;
Professor argl;
Student arg2;
return 0;
}

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