Infinity Series Prototype : coded version of Infinity Series

InfinitySeries.cpp

#include "InfinitySeries.hpp"

void InfinitySeries::generate(int size){

    series.assign(size,0);//populate array first
    index = 0; //set index for the array.
    
    //start from fundamental. numbers only shows the relative relationships(interval) but absolute relationship.
    do{
        //first two step.
        if(index==0){
            series.at(0) = 0;
        }
        if(index==1){
            series.at(1) = (series[0] + 1);
        }
        index ++;
    }while(index < 2);
    
    for(int i = 1; i < size/2; i ++){
        series[2*i] = series[2*i-2] - (series[i] - series[i-1]);
        series[2*i+1] = series[2*i-1] + (series[i] - series[i-1]);
        index++;
    }
    
    for(unsigned int i = 0; i < series.size(); i++){
        std::cout<< i+1 <<" Series : "<<series[i]<<std::endl;
    }
    
}

int InfinitySeries::get_val(int column){
    
    return series.at(column);
}

int InfinitySeries::getSize(){
    
    return series.size();
}

    
    

InfinitySeries.hpp

#include <iostream>
#include <vector>

class InfinitySeries{
    
public:
//    InfinitySeries();
//    ~InfinitySeries();
    void generate(int size);
    int get_val(int column);
    int getSize();
    
private:
    std::vector<int>series;
    int index;
    
    
};