Question

I need to create the following struct in C++

1. id (integer) - identifies the element
2. texture (string) - specifies the appearance of the element (rabbit, fox, etc.)
3. color (integer)
4. health (double)
5. Dimensions – length, width, and height. All three values are doubles (these variables will be also stored in struct "dimension" )
6. Hostile (Boolean) – determines if the animal is hostile (1) or peaceful (0)

I need a function (outside the struct) that will read the data and inport from the following txt file into an array. The first line is a number indicating the number of elements in the file.

10
0    rabbit        brown        10    .3    .1    .1    0
1    rabbit        brown         10    .4    .1    .1    0
2    rabbit        grey         10   .2    .1    .1    0
3    deer         brown         25   2    .3    .7    0
4    deer         brown         25   1.5 3   .9   0
5    fox       orange       16   1.1   .2   .4   0
6    fox       orange        16   .9   .3   .3   0
7    rat           black       9   .2   .1   .05   1
8    rat            black       6   .1   .08   .05   1
9    pigeon        grey       1   .03   .01   .02   0

Answer 1

#include <iostream>

#include <fstream>

#define MAX 10

using namespace std;

//dimension structure with l b and h values

struct dimension

{

    double l;

    double b;

    double h;

};

//pets structures to store data from input file

struct pets

{

    int id;

    string texture;

    string color;

    double health;

    struct dimension Dimensions;

    bool hostile;

} petDetails[MAX]; //array of MAX elements here MAX is 10 you can increase it

//for dynamic Dimensions vectors can be used

//function to read input from given file name it stores data into the array of structures

//and return number of elements stored in array

int readFromFile(string fileName)

{

    ifstream file(fileName); //opening file

    //if not opend then exit

    if (!file.is_open())

    {

        cout << "Input File is not present!" << endl;

        exit(1);

    }

    //take inputs from file

    int numberOfPets;

    //first input is an integer denoting number of elements

    file >> numberOfPets;

    //taking input for each line and storing them into appropriate variable

    for (int i = 0; i < numberOfPets; i++)

    {

        file >> petDetails[i].id;

        file >> petDetails[i].texture;

        file >> petDetails[i].color;

        file >> petDetails[i].health;

        file >> petDetails[i].Dimensions.l;

        file >> petDetails[i].Dimensions.b;

        file >> petDetails[i].Dimensions.h;

        file >> petDetails[i].hostile;

    }

    // returning number of elements stored in the array

    return numberOfPets;

}

//diplay all attribute of a pet structutre

void displayPet(struct pets pet) {

    cout<<"Id: "<< pet.id<<endl;

    cout<<"Texture: "<< pet.texture<<endl;

    cout<<"Color: "<< pet.color<<endl;

    cout<<"Health: "<< pet.health<<endl;

    cout<<"Length: "<< pet.Dimensions.l<<" ";

    cout<<"Breath: "<< pet.Dimensions.b<<" " ;

    cout<<"Height: "<< pet.Dimensions.h<<endl;

    cout<<"Hostile: "<< pet.hostile<<endl;

    cout<<"======================================"<<endl;

}

//main function driver

int main(int argc, char const *argv[])

{

    string fileName;

    //ask for file name input

    cout << "Enter a input file name: ";

    cin >> fileName;

    //get number of elemnts in the array

    int length = readFromFile(fileName);

    //print all the elements

    for (int i = 0; i < length; i++)

    {

        displayPet(petDetails[i]);

    }

    return 0;

}

Output:

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