#include<stdio.h>#include<math.h>int main(){float x[10],y[15][15];int n,i,j;printf("Enter n : ");scanf("%d",&n);printf("X\tY\n");for(i = 0;i<n;i++){scanf("%f %f",&x[i],&y[i][0]);}//forward difference tablefor(j=1;j<n;j++)for(i=0;i<(n-j);i++)y[i][j] = y[i+1][j-1] - y[i][j-1];printf("\n***********Forward Difference Table ***********\n");//display Forward Difference Tablefor(i=0;i<n;i++){printf("\t%.2f",x[i]);for(j=0;j<(n-i);j++)printf("\t%.2f",y[i][j]);printf("\n");}//backward difference tablefor(j=1;j<n;j++)//for j = 0 initially input is taken so we start from j=1for(i=n-1;i>(j-1);i--)y[i][j] = y[i][j-1] - y[i-1][j-1];printf("\n***********Backward Difference Table ***********\n");//display Backward Difference Tablefor(i=0;i<n;i++){printf("\t%.2f",x[i]);for(j=0;j<=i;j++)printf("\t%.2f",y[i][j]);printf("\n");}return 0;}

## Sunday, January 22, 2012

### Numerical Method: Newton’s Forward and Backward Interpolation in C/C++

### About Author

**Bibek Subedi** is a computer engineering gratuate and founder of Programing Techniques. He loves researching in the field of Machine learning, data mining and Algorithms. He is a part time blogger, a bathroom singer (:D) and an employer of a software company. You can follow him in Twitter and find him in Facebook or mail him

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