solution4and3

#include <bits/stdc++.h>
using namespace std;
class solution4
{
    double a = 1.65;
    double h = 0.1;

    double case1(double xx)
    {
        return -3*xx*xx;
    }
    double case2(double xx)
    {
        return a * xx + 4 * sqrt(xx);
    }
    double case3(double xx)
    {
        return log(xx+4)*sqrt(xx+a);
    }
    public:
    void cMain()
    {

        double y;
        for(double x = 0.1; x < 2.1 ; x = x + h)
        {
            if(x<1.4) y = case1(x);

            else if(x==1.4) y = case2(x);

            else if(x>1.4) y = case3(x);

            cout << x << " " << y << endl;//OUTPUT ozunuz deyisin uygun formaya
        }
    }
};
//*************************************************************************
class solution3
{
    double a = 2.8;
    double h = 0.05;
    double b = 0.3;

    double case1(double xx)//x>1.3
    {
        return a * xx * xx + b * xx + a;
    }
    double case2(double xx)//x<1.2
    {
        return a / xx + sqrt(xx * xx + 1);
    }
    double case3(double xx)//1.2<=x<1.3
    {
        return (a + b * xx) * sqrt(xx * xx + 1);
    }
    public:
    void cMain()
    {

        double y;
        for(double x = 1; x <= 2.05 ; x = x + h)
        {
            if(x>1.3) y = case1(x);

            else if(x<1.2) y = case2(x);

            else if(x>=1.2 && x<=1.3) y = case3(x);

            cout << x << " " << y << endl;//OUTPUT ozunuz deyisin uygun formaya
        }
    }
};
//*************************************************************
int main() {
   // solution4 a;
    //a.cMain();
    solution3 b;
    b.cMain();
    return 0;
}