Question

C++:

questions are in fish.h. Write the code in fish.cpp and main.cpp

#ifndef FISH_H #define FISH_H #include <vector> class Fish { public: // (1 point) // Write code to initialize edible to is_edible, age to 0, size to 1. Fish (bool is_edible); // (1 point) // Print the vital stats (size and age) of the fish. void Print(); // (1 point) // If fish is at least the age of reproduce_age, reproduce with probability // of reproduce_probability. If reproduce, return pointer to new baby fish. // If not reproduce, return nullptr. Fish* Reproduce(); 11 (1 point) // Increase size by 50%. Increase age by 1. Set alive to false with // probability of 0.1. Ignore the input vector. void Grow(const std::vector<Fish*>& fish_in_cell); // (1 point) // Write a getter function to return the size of the fish. float GetSize(); // (1 point) // Write a getter to return whether this fish is edible. bool IsEdible(); bool alive; // Initialized to true

Answer 1

SOURCE CODE

//fish.h

#ifndef FISH_H

#define FISH_H

#include <vector>

#include <iostream>

#include <cstdlib> //to use rand() and srand()

#include <ctime> // to use time()

using namespace std;

class Fish{

public:

//set edible to is_edible

Fish(bool is_edible){ edible = is_edible; }

//print size and age

void Print()

{

cout << "\nSize: " << size << ", Age: " << age << endl;

}

//reproduce with probablity reproduce_probability

//only if age >= reproduce_age

Fish *Reproduce()

{

//check age

if(age >= reproduce_age)

{

//generate new fish with same edibility as parent

//with given probablity

if(rand() % 10 < reproduce_probability * 10)

return new Fish(edible);

}

//return NULL if conditions are not satisfied

return NULL;

}

//grow fish based on conditions

void Grow(const vector<Fish*>& fish_in_cell)

{

age++;

size += size*0.5;

if(rand() % 10 < 1) alive = false;

}

//getter functions

float getSize(){ return size; }

bool isEdible(){ return edible; }

bool alive = true;

private:

//setting values as mentioned

constexpr static const float reproduce_probability = 0.6;

static const int reproduce_age = 3;

float size = 1;

int age = 0;

bool edible;

};

#endif

//main.cpp

#include <iostream>

#include <vector>

#include "fish.h"

//tetsing the Fish class using main functions

using namespace std;

int main()

{

const vector<Fish *> fish_in_cell;

srand(time(0)); // to generate a new random function everytime rand() is called

Fish f(false); // declaring an unedible fish

//print size and age

f.Print();

//grow fish to age 1

f.Grow(fish_in_cell);

if(f.alive) f.Print();

//grow fish to age 3, in order to reproduce

f.Grow(fish_in_cell);

f.Grow(fish_in_cell);

//declare new fish pointer, set it to NULL

Fish *f1 = NULL;

//if old fish is alive, reproduce

if(f.alive)

{

f.Print();

f1 = f.Reproduce();

}

//if reproduction successful, print details of new fish

if(f1) f1->Print();

return 0;

}

OUTPUT

Size: 1, Age: 0 Size: 1.5, Age: 1 Size: 3.375, Age: 3 Size: 1, Age: 0