main cpp include iostream include culc hpp int main int std cout Input

//main.cpp

#include <iostream>
#include "culc.hpp"

int main()
{
	int n = 1;
	std::cout<<"Input number of iteration"<<std::endl;
	std::cin>>n;
	Calc *c = new Calc(n);
	c->Initalfaln();
	c->Showalfa0();
	delete c;
	return 0;
}

//culc.hpp

#ifndef __CULC__
#define __CULC__

//#include <stdio.h>

#include <gmpxx.h>
#include <mpfr.h>

#include <vector>

#define NUM 1000

class Calc
{
public:
	Calc();
	Calc(int _n);
	~Calc();
	void Initalfaln();
	void Showalfa0();
	int n;
	std::vector<mpfr_t> alfa0;

};

#endif 

//culc.cpp
#include "culc.hpp"

Calc::Calc()
{
	for(unsigned int i = 0; i < alfa0.size(); i++)
	{
		mpfr_clear(alfa0[i]);
	}
}
Calc::Calc(int _n)
{
	n = _n;
}
Calc::~Calc()
{
}
void Calc::Initalfaln()
{
	long int x = 0;
	mpfr_t  y;
	mpfr_init2 (y, NUM);
	
	for(unsigned int i = 0; i < n; i++)
	{
		if(i%2==0)
		{
			x = 1;
		}
		else
		{
			x = -1;
		}
		mpfr_set_ui (y, i, MPFR_RNDD);
		mpfr_si_div (y, x, y, MPFR_RNDD); 
		alfa0.push_back(y);
	}
}
void Calc::Showalfa0()
{
	for(unsigned int i = 0; i < alfa0.size(); i++)
	{
		mpfr_out_str(stdout, 10, 0, alfa0[i], MPFR_RNDD);
		//std::cout<<std::endl;
	}
}