Experiments

1. MyIP: A Python script to know your IP Address.

#!/usr/bin/env python

""" A Python script to find out your IP Address
    Written By Sreejith K
    sreejithemk@gmail.com
    http://sreejithemk.net
"""

import urllib2

ip = urllib2.urlopen('http://whatismyip.org')
for line in ip.readlines():
	print '33[31m' + line + '33[0m'

Copy this code to a file and name it myip and then move it to /usr/bin. Now it'll be a bash command.

2. Recursive solution for determinent of a matrix

   /*
   /*
   ############ A RECURSIVE METHOD TO FIND THE DETERMINENT OF A MATRIX ############
   ############################ WRITTEN BY SREEJITH K##############################
   ########################### http://sreejithemk.net #############################
   ########################### sreejithemk@gmail.com  #############################
   */
   
   #include <stdio.h>
   
   float input_matrix[10][10],adj_matrix[10][10],inverse[10][10] ;
   float sub[10][10] ;
   
   main()
   {
   	int i,j,order,determ = 0;
   	printf("Order: ");
   	scanf("%d",&order);
   	for (i=0;i<order;i++)
   		for (j=0;j<order;j++)
   			scanf("%f",&input_matrix[i][j]);
   	determ = determinent (input_matrix, order);
   	printf("\nDeterminent: %d\n",determ) ;
   }
   
   int pow (int a, int b)
   {
   	int i,p=1 ;
   	for (i=0;i<b;i++)
   		p=p*a;
   	return p ;
   }
   
   int determinent (float a[10][10], int order)
   {
   	int i,j,det=0 ;
   	if (order == 1) return a[0][0] ;
   	if (order == 2) return ((a[0][0] * a[1][1]) - (a[0][1] * a[1][0])) ;
   	else
   	{
   		for (i=0; i<order;i++)
   		{
   			submatrix (a, i, order) ; // To find the Submatrix of a matrix removing the ith 0th row and ith column
   			det += pow(-1,i) * a[i][0] * determinent (sub, order-1) ; // Recursively find the determinent using sub matrix
   		}
   		return det ;
   	}
   }
   
   void submatrix (float a[10][10], int column, int order) // To find the Submatrix of a matrix
   {
   	int i,j,k=0,l=0 ;
   	for (i=0;i<order;i++)
   	{
   		for (j=0;j<order;j++)
   		{
   			if (i != 0 && j != column)
   			{
   				sub[k][l] = a[i][j] ;
   				l++ ;
   			}
   		}
   		k++ ;
   	}
   }