how to use jpeg images in c++

[trippin5p0rt5]

#include <iostream>
#include <string>

using namespace std;

class dog
{
private:
	int weight;
	string name;
public:
	dog();
	dog(int,string);
	dog(int);
	void bark();
	void identify();
	void setname(string);
	
};
 // 3 constructors
dog::dog()
{
	weight = 2;
	name="Unknown";
}

dog::dog(int a)
{
	weight = a;
	name="Mark A.";
}

dog::dog(int a, string b)
{
	weight = a;
	name = b;
}

void dog::setname(string b)
{
	name = b;
}


// Functions: 





void dog::bark()
{
	if(weight<25)
	
		cout<<"Yip! Yip!";
		
		
	
	if(weight>25 && weight<50  )
		
		cout<<"Woof!! Woof!!";

	if(weight>50 && weight<100)
		
		cout<<"Woof!! Woof!!";
		
	
	
	if(weight>100)
		
		cout<<"You have a fat dog!!";
		
	
}



void dog::identify()
{
	cout<<name<<" is a "<<weight<<"lb dog."<<endl;
}
	
int main()
{
	string name;
	int weight;
	
	cout << "INPUT THE NAME AND WEIGHT OF YOUR DOG" << endl;
	cin>>name>>weight;
       // creating  an object firstDog
	dog firstDog(weight,name);
	cout<<endl;
// Calling a function for  the object firstDog
	firstDog.bark();
	cout<<endl;
	firstDog.identify();
	
	
	cout<<""<< endl;
	cout << "INPUT THE NAME AND WEIGHT OF YOUR DOG" << endl;
	cin>>name>>weight;
       // creating  an object thirdDog
	dog thirdDog(weight,name);
	cout<<endl;
// Calling a function for  the object firstDog
	thirdDog.bark();
	cout<<endl;
	thirdDog.identify();
	
	
	
	cout<<""<<endl;
	cout<<"THE PROGRAMS DOG";
	dog secondDog(95,"Jigar");
	
	cout<<endl;
	
	secondDog.bark();
	cout<<endl;
	secondDog.identify();
	secondDog.setname("Mark A.");
	cout<<""<<endl;
	cout<<"YOUR DOG WAS RENAMED...";
	secondDog.identify();
           return 0;
}

i was wondering how to make dogs according to the sizes come up in a jpeg image??
thank you for your help!!!!!!!!