#include <sstream>
 
//....
 
string valor = mpf_get_str(NULL, &buff, 10, 0, sumatoria);
stringstream aux;
 
for (i = 1; i < digitos * 100 + 1; i++) {
       aux << valor[i];
       if (i % 10 == 0) aux << ' ';
       if (i % 500 == 0) aux << endl;
       if (i % 50 == 0 && i < digitos * 100) aux <<endl << i + 1 << ":\t";
}
aux << endl;
 
cout<<aux.str();
 

int x = 1;
int y = 1;
 
pintar(x,y);

struct Cord
{
    int X,Y;
 
   Cord(int x,int y) : X(x),Y(y) {}
};
 
//...
 
pintar(Cord(1,1));

class Cord
{
	int X,Y;
 
	public:
 
	Cord(int x,int y) : X(x),Y(y) {}
 
	int getX() const {return X;}
	int getY() const {return Y;}
	void setX(int x){X = x;}
	void setY(int y){Y = y;}
 
	bool operator==(const Cord a) const {return X == a.X && Y == a.Y;}
	bool operator!=(const Cord a) const {return X != a.X || Y != a.Y;}
        Cord operator+(const Cord a) const{return Cord(A.X+X,A.Y+Y);}
};
 
//...
 
Pintar(Cord(1,1));]

for (int i = 0;i < v.size(); i++)
    swap(v[i],v[rand()%A.size()]);

void swap(int &a,int &b)
{
    int c = a;
    a = b;
    b = c;
}