I don\'t need If sttatements in my programs because of the Preconditions: I don\

Question

I don't need If sttatements in my programs because of the Preconditions: I don't need to check the conditions for that part, I assume it is already given to me

Instructor: Hazel M. Olyle

What To Do

Create a Elephants class and declare the following class member variables (you can choose thenames), which are meant to hold information describing an elephant . Make all these variables private and properly comment them. Here is an example of a declaration with a suitable comment:

char gender; // the gender of this elephant.

Explanation / Answer

ok just a couple of deletions and some changes in main.cpp...

//Elephant.cpp

#include "Elephant.h"

Elephant::Elephant(string n, int y, int m, char g)
: nickname(n), birthYear(y), birthMonth(m), gender(g),
tag(-1), mother(NULL), father(NULL), childCount(0)
{
}

Elephant::Elephant(string n, int y, int m, char g,
                   int t, Elephant * mom, Elephant * dad)
: nickname(n), birthYear(y), birthMonth(m), gender(g),
tag(t), mother(mom), father(dad), childCount(0)
{
    ++(mother->childCount);
    ++(father->childCount);
}

void Elephant::addMother(Elephant * mom)
{
    mother = mom;
    ++(mother->childCount);
}

void Elephant::addFather(Elephant * dad)
{
    father = dad;
    ++(father->childCount);
}

//main.cpp

#include <iostream>
#include "Elephant.h"
using namespace std;

void printElephantInfo(const Elephant& e)
{
    cout << e.getName() << " was born in " << e.getMonth() << "/" << e.getYear()
         << ". " << (e.isMale() ? "His" : "Her")
         << " father is " << (e.getFather() ? e.getFather()->getName() : "unknown")
         << " and mother is " << (e.getMother() ? e.getMother()->getName() : "unknown")
         << ". " << (e.isMale() ? "He" : "She") << " has " << e.getNumChildren() << " child(s). ";
    if (e.getTag() == -1)
        cout << "Tag: none ";
    else
        cout << "Tag: " << e.getTag() << " ";
}

int main()
{
    Elephant elephantA("Elephant A ?D", 1999, 5, 'M');
    Elephant elephantB("Elephant B ??", 2004, 2, 'F');
    Elephant elephantC("Elephant C A?", 2006, 12, 'F');
    Elephant elephantD("Elephant D ??", 2003, 7, 'F');
    Elephant elephantE("Elephant E AB", 2012, 8, 'M', 1, &elephantB, &elephantA);
    Elephant elephantF("Elephant F ?C", 2013, 10, 'F', 3, &elephantC, &elephantA);

    elephantA.setTag(1);
    elephantB.setTag(1);
    elephantA.addMother(&elephantD);


    printElephantInfo(elephantA);
    printElephantInfo(elephantB);
    printElephantInfo(elephantC);
    printElephantInfo(elephantD);
    printElephantInfo(elephantE);
    printElephantInfo(elephantF);
}

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