c programe of Lagrange's Formula

Implementatio of Lagrange’s Formula.

#include<stdio.h>

#include<math.h>

#include<conio.h>

#include<process.h>

#include<string.h>

void main()

{

  int n;

  int i,j;

  float ax[100];

  float ay[100];

  float x=0;

  float y=0;

  float nr;

  float dr;

  clrscr();

  printf("\n Enter the number of terms--");

  scanf("%d",&n);

  printf("\n\n Enter the value in the form of x-");

  for(i=0;i<n;i++)

  {

     printf("\n\n Enter the value of x%d-",i+1);

     scanf("%f",&ax[i]);

     }

     printf("\n\n Enter the value in the form of y-");

     for(i=0;i<n;i++)

     {

       printf("\n\n Enter the value of y%d-",i+1);

       scanf("%f",&ay[i]);

     }

      printf("\n\n Enter the value of x for");

      printf("\n which you want the value of y-");

      scanf("%f",&x);

      for(i=0;i<n;i++)

     {

       nr=1;

       dr=1;

       for(j=0;j<n;j++)

       {

             if(j!=1)

             {

               nr=nr*(x-ax[j]);

               dr=dr*(ax[i]-ax[j]);

               }

               y+=(nr/dr)*ay[i];

               }

               }

               printf("\n\n when x=%5.2f,y=%5.2f",x,y);

               printf("\n\n\n Press Enter to Exit");

               getch();

               }