using System;
using static System.Console;
using static System.Math;
class main {

static void Main(){

int n=10, N=200;
double[] x = new double[n];
double[] y = new double[n];
var rnd=new Random(1);

int i; double k;
for (i=0, k=-4.5; i<n; k++, i++){
/*
	x[i]=k;
	y[i]=1/(1+x[i]*x[i]);
*/
/*
	x[i]=i+0.5*Sin(i);
	y[i]=i+Cos(i*i);
*/
	x[i]=k;
	y[i]=x[i]+10*rnd.NextDouble();
	WriteLine("{0:g6} {1:g6}",x[i],y[i]);
	}

Write("\n\n");

var cs = functional_cspline.make_cspline(x,y);
double z, step=(x[n-1]-x[0])/(N-1);
for (z=x[0], i=0; i<N; z=x[0]+(++i)*step){
	Console.WriteLine("{0:g6} {1:g6}", z, cs(z));
	}

}//Main

}//main