Create Stack Using C Programming

#include<stdio.h>
#include<conio.h>

#define col 4

#define row 4

void main()

{

            int i,n,j;

            float ax[row+1], ay[col+1],diff[row+1][col+1],x,p,ya1,ya2,ya3,ya4,ya,ha;

            clrscr();

            printf("Enter thae value of n:");

            scanf("%d",&n);

            printf("\n Enter thae values of X and Y:\n");

            for(i=0; i<=n; i++)

            {

                        scanf("%f %f",&ax[i],&ay[i]);

            }

            printf("Value of X:");

            scanf("%f",&x);

            ha=ax[1]-ax[0];

            for(i=0; i<=n-1; i++)

                        diff[i][1]=ay[i+1]-ay[i];

            for(j=2; j<=row; j++)

                        for(i=0; i<=n-j; i++)

                                    diff[i][j]=diff[i+1][j-1]-diff[i][j-1];

            p=(x-ax[0])/ha;

            ya1=p*diff[0][1];

            ya2=p*(p-1)*diff[0][2]/2;

            ya3=p*(p-1)*(p-2)*diff[0][3]/6;

            ya4=p*(p-1)*(p-2)*(p-3)*diff[0][4]/24;

            ya=ay[0]+ya1+ya2+ya3+ya4;

            printf("%f",ya);

            getcha();

}