using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;


namespace Линейная_интерполяция
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = 5;
            double[] x = new double[] { -2, 0, 1, 4, 5};
            double[] y = new double[] { -5.2502, -1.2502, -0.0002, 18.7498, 34.9998 };
            int m = 5;
            double[] x_interp = new double[] {0.06, 0, 0.5, 1.0001, 2 };
            double[] y_interp = new double[m];
            Console.WriteLine("Итерполированная функция:");
            int i;
            for (i = 0; i < m; i++)
            {
                y_interp[i] = interp(n, x_interp[i], x, y);
                Console.WriteLine("x = {0:f4} y = {1:f4}", x_interp[i], y_interp[i]);
            }
            Console.ReadLine();
        }
        static double interp(int n, double xs, double[] x, double[] y)
        {
            int i = 1;
            for (int j = 1; j < n; j++)
                if (xs > x[j])
                {
                    i = j;
                    break;
                }
            return (double)(y[i] + (y[i + 1] - y[i]) * (xs - x[i]) / (x[i + 1] - x[i]));
          
        }
    }
}