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Saving Strings

noylekul (47)
Ok, so I've got a new issue with my program. Can anyone point me in the right direction on this one? Tell me where I went wrong?

So the program is an electronic pet, and it saves your pet when your done playing, or you can start with a new pet when you play again.

The problem I'm having is that when I reopen a pet, the numbers are way off... Here is an example of what I get when I reopen a pet.

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Is this a new pet? Yes (1) , No (2)
2
What is your pets name?  Dog

Your pet Dog is
Happy: 63
Hungry: -1268712568
Energy: 0
Health: 4201184
What would you like to do with your pet?
 Play (1)
 Feed (2)
 Rest (3)
 Exercise (4)
 Vet Visit (5)
 Exit (0)


What its suppose to look like.

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Your pet Dog is
Happy: 64
Hungry: 75
Energy: 35
Health: 95
What would you like to do with your pet?
 Play (1)
 Feed (2)
 Rest (3)
 Exercise (4)
 Vet Visit (5)
 Exit (0)


Here is my code:

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#include<iostream>
#include<fstream>
#include<string>
using namespace std;

class pet{
private:
        int hunger;  // private data member
        int happy;   // private data member
        int health;
        int energy;
        string name; // private data member
public:
        pet(); // constructor
        void play();  // public member function
        void feed();  // public member function
        void vetvisit();
        void rest();
        void exercise();
        void print(); // public member function
        int check_health(); // public member function;

};


int main()
{
        pet pet1;
        int choice = 3;
        int health_check = 0;
        ofstream myfile;
        do{
                pet1.print();
                cout << "What would you like to do with your pet?\n";
                cout << " Play (1) \n Feed (2) \n Rest (3) \n Exercise (4) \n Vet Visit (5) \n Exit (0) \n";
                cin >> choice;
                switch(choice){
                case (1):
                        pet1.play();
                        break;
                case (2):
                        pet1.feed();
                        break;
                case (3):
                        pet1.rest();
                        break;
                case (4):
                        pet1.exercise();
                        break;
                case (5):
                        pet1.vetvisit();
                        break;
                }
                health_check = pet1.check_health();
        }while(choice != 0 && health_check != 1);

        myfile.close();
        return 0;
}

/* Constructor, creates a new pet with starting values. */
pet::pet(){


        int choice1 = 0;
        cout << "Is this a new pet? Yes (1) , No (2) " << endl;
        cin >> choice1;
        switch(choice1){

  case (1): {
        ofstream myfile;
        hunger = 50;
        happy = 50;
        energy = 50;
        health = 50;
        cout << "Pet's name? (One word) ";
        cin >> name;
        myfile.open (name.c_str());
        cout << "Saving pet to a file."<< endl;
        break;
}

  case (2):
        ofstream myfile;
        cout << "What is your pets name?  ";
        cin >> name;
        myfile.open (name.c_str());
        break;
        }



}

/* Member function play(), allows playing with a pet. */
void pet::play(){
        int choice = 0;
        cout << "What should we play?\n";
        cout << " Fetch (1) \n Sit (2) \n Rollover (3) \n Shake (4) \n";
        cin >> choice;
        switch(choice){
        case(1):
                cout << " :-) \n";
                happy += 15;
                hunger -= 15;
                health += 10;
                energy -= 15;
                break;
        case(2):
                cout << " :-) \n";
                happy += 5;
                hunger -= 5;
                health += 2;
                energy -= 2;
                break;
        case(3):
                cout << " :-) \n";
                happy += 10;
                hunger -= 10;
                health += 5;
                energy -= 5;
                break;
        case(4):
                cout << " :-) \n";
                happy += 7;
                hunger -= 7;
                health += 3;
                energy -= 3;
                break;
        default:
                cout << "Not a valid choice." << endl;
        }
}
/* Member function feed(), allows the user to feed a pet. */
void pet::feed(){
        int choice = 0;
        cout << "What would you like to feed your pet?\n";
        cout << " Dry Food (1) \n Wet Food (2) \n Organic Food (3) \n";
        cin >> choice;
        switch(choice){

        case(1):
                cout << " :-) \n";
                happy += 15;
                hunger += 30;
                health += 10;

                energy -= 20;
                break;
        case(2):
                cout << " :-) \n";
                happy += 30;
                hunger += 30;
                health += 10;
                energy -= 20;
                break;
        case(3):
                cout << " :-) \n";
                happy -= 1;
                hunger += 30;
                health += 20;
                energy -= 20;
                break;
        }
}
void pet::rest(){
        int choice = 0;
        cout << "How long would you like to allow your pet to rest? \n";
        cout << " 1 hour (1) \n Half day (2) \n Overnight (3) \n";
        cin >> choice;

        switch(choice){
        case(1):
                cout << " :-) \n";
                happy += 10;
                hunger -= 10;
                health += 5;

                energy += 10;
                break;
        case(2):
                cout << " :-( \n";
                happy -= 15;
                hunger -= 15;
                health += 10;
                energy += 20;
                break;
        case(3):
                cout << " :-( \n";
                happy -= 30;
                hunger -=20;
                health += 5;
                energy += 40;
                break;
        }
}
void pet::exercise(){
        int choice = 0;
        cout << "What type of exercise? \n";
        cout << " Walk (1) \n Jog (2) \n Run (3) \n";
        cin >> choice;

        switch(choice){
        case(1):
                cout << " :-) \n";
                happy += 3;
                hunger -= 15;
                health += 5;
                energy -= 15;
                break;
        case(2):
                cout << " :-| \n";
                happy -= 5;
                hunger -= 25;
                health += 15;
                energy -= 20;
                break;
        case(3):
                cout << " :-( \n";
                happy -= 10;
                hunger -= 30;
                health += 35;
                energy -= 35;
                break;
        }
}

void pet::vetvisit(){
        cout << "Make sure you are watching your pet closely and doing whats best for your pet!\n";
        cout << " :,-( \n";
                happy -= 40;
                hunger -= 25;
                health += 50;
                energy -= 30;
}

/* Member function print(), prints information about a pet. */
void pet::print(){
        cout << "\nYour pet " << name << " is " << endl;
        cout << "Happy: " << happy << endl;
        cout << "Hungry: " << hunger << endl;
        cout << "Energy: " << energy << endl;
        cout << "Health: " << health << endl;
}

/* Member function check_health(), checks the health of a pet. */
int pet::check_health(){
        if(hunger <= 0){
                cout << "\nYour pet has starved.\n";
                return 1;
        }
        if(happy <= 0){
                cout << "\nYour pet has died of a broken heart.\n";
                return 1;
        }
        if(health <= 0){
                cout << "\nYour pet has become ill and died.\n";
                return 1;
        }
        if(energy <= 0){
                cout << "\nYour pet is too fatigued and died.\n";
                return 1;
        }
        if(hunger <= 20){
                health -= 15;
                happy -= 2;
                energy -= 2;
        }
        if(happy <= 20){
                health -= 15;
                energy -= 2;
                hunger -= 1;
        }
        if(energy <= 20){
                health -= 15;
                happy -= 2;
                hunger -= 1;
        }
        if(health <= 20){
                energy -= 2;
                happy -= 2;
                hunger -= 1;
        }
        if(health > 100){
                health -= 10;
        }
        if(happy > 100){
                happy -= 10;
        }
        return 0;
}
Ch1156 (1999)
its because your not outputting anything to the text file, to output you need to do:

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myfile << hunger << endl;
myfile << happy << endl;
myfile << energy << endl;
myfile << health << endl;


your also not getting the values. your trying to output the value again when you load it, you need to use ifstream myfile, not ostream

myfile >> hunger;

etc.
noylekul (47)
Ok, so myfile << hunger << endl; goes just before myfile.close() right?
Ch1156 (1999)
yes sandwiched between myfile.open and myfile.close.
Last edited on
noylekul (47)
This is the error I'm getting after I make those changes.

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-bash-4.1$ g++ pet.cpp
pet.cpp: In function 'int main()':
pet.cpp:63: error: 'hunger' was not declared in this scope
pet.cpp:64: error: 'happy' was not declared in this scope
pet.cpp:65: error: 'energy' was not declared in this scope
pet.cpp:66: error: 'health' was not declared in this scope
pet.cpp: In constructor 'pet::pet()':
pet.cpp:98: error: no match for 'operator<<' in 'myfile.std::basic_ifstream<char, std::char_traits<char> >::<anonymous>.std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&((pet*)this)->pet::hunger))) << std::endl'
pet.cpp:99: error: no match for 'operator<<' in 'myfile.std::basic_ifstream<char, std::char_traits<char> >::<anonymous>.std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&((pet*)this)->pet::happy))) << std::endl'
pet.cpp:100: error: no match for 'operator<<' in 'myfile.std::basic_ifstream<char, std::char_traits<char> >::<anonymous>.std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&((pet*)this)->pet::energy))) << std::endl'
pet.cpp:101: error: no match for 'operator<<' in 'myfile.std::basic_ifstream<char, std::char_traits<char> >::<anonymous>.std::basic_istream<_CharT, _Traits>::operator>> [with _CharT = char, _Traits = std::char_traits<char>](((int&)(&((pet*)this)->pet::health))) << std::endl'
noylekul (47)
I changed it all to fstream to make it read and write, still the same problem.

Anyone else have an idea?
Ch1156 (1999)
I did and it worked for me, the problem is, is that you arent setting the values of health, hunger etc, so the code has no idea what to output, also if your just using classes for variables, then use a struct.
noylekul (47)
I'm not sure how I'm not setting the values? They start out at a certain number every time, and then when you exit the program it saves the values.
Ch1156 (1999)
I edited this and it outputs the correct values instead of a bunch of numbers

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pet::pet(){

        hunger = 20;
        happy = 20;
        health = 50;
        energy = 50;

        int choice1;
        cout << "Is this a new pet? Yes (1) , No (2) " << endl;
        cin >> choice1;

        switch(choice1){

  case 1: {
        ofstream myfile;
        cout << "Pet's name? (One word) ";
        cin >> name;
        myfile.open (name.c_str());
        cout << "Saving pet to a file."<< endl;
        myfile << hunger << endl;
        myfile << happy << endl;
        myfile << energy << endl;
        myfile << health << endl;
        break;
        }

  case 2:
        ifstream myfile;
        cout << "What is your pets name?  ";
        cin >> name;
        myfile.open (name.c_str());

        myfile >> hunger;
        myfile >> happy;
        myfile >> energy;
        myfile >> health;
        break;
        }
}
noylekul (47)
Ok, I tried that and it gives me the starting values when you start the game, not the values when you last played.
noylekul (47)
Think it might be something wrong with this area?

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int main()
{
        pet pet1;
        int hunger;
        int happy;
        int health;
        int energy;

        int choice = 3;
        int health_check = 0;
        ifstream myfile;
        do{
                pet1.print();
                cout << "What would you like to do with your pet?\n";
                cout << " Play (1) \n Feed (2) \n Rest (3) \n Exercise (4) \n Vet Visit (5) \n Exit (0) \n";
                cin >> choice;
                switch(choice){
                case (1):
                        pet1.play();
                        break;
                case (2):
                        pet1.feed();
                        break;
                case (3):
                        pet1.rest();
                        break;
                case (4):
                        pet1.exercise();
                        break;
                case (5):
                        pet1.vetvisit();
                        break;
                }
                health_check = pet1.check_health();
        }while(choice != 0 && health_check != 1);
        myfile >> hunger;
        myfile >> happy;
        myfile >> energy;
        myfile >> health;
        myfile.close();
        return 0;
}
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