{ "metadata": { "name": "" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Chapter 5: Pointers" ] }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.1, Page number: 135" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number: '))\n", "b = int(raw_input('Enter second number: '))\n", "\n", "# Calculation and result\n", "print ('The original values are a = %d b = %d' % (a, b))\n", "temp = a\n", "a = b\n", "b = temp\n", "\n", "print ('The values after swapping are a = %d b = %d' % (a, b))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number: 15\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number: 27\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "The original values are a = 15 b = 27\n", "The values after swapping are a = 27 b = 15\n" ] } ], "prompt_number": 1 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.2, Page number: 136" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number: '))\n", "b = int(raw_input('Enter second number: '))\n", "\n", "# Function declaration, calculation and result\n", "print ('The original values are a = %d b = %d' % (a, b))\n", "\n", "def swap (a, b) :\n", " temp = a\n", " a = b\n", " b = temp\n", " print ('The values after swapping are a = %d b = %d' % (a, b))\n", "\n", "swap (a, b)\n" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number: 15\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number: 27\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "The original values are a = 15 b = 27\n", "The values after swapping are a = 27 b = 15\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.3, Page number: 141" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number: '))\n", "b = int(raw_input('Enter second number: '))\n", "\n", "# Function declaration, calculation and result\n", "print ('The original values are a = %d b = %d' % (a, b))\n", "\n", "def swap (a, b) :\n", " temp = a\n", " a = b\n", " b = temp\n", " print ('The values after swapping are a = %d b = %d' % (a, b))\n", "\n", "swap (a, b)" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number: 15\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number: 27\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "The original values are a = 15 b = 27\n", "The values after swapping are a = 27 b = 15\n" ] } ], "prompt_number": 3 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.4, Page number: 145" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number: '))\n", "b = int(raw_input('Enter second number: '))\n", "\n", "# Function declaration, calculation and result\n", "print ('In main the original values are a = %d b = %d' % (a, b))\n", "print ('In main the address of a is %x and address of b is %x' % (a, b))\n", "\n", "def swap (a, b) :\n", " print ('In swap the address in a is %x and b is %x' % (a, b))\n", " temp = a\n", " a = b\n", " b = temp\n", " print ('The values after swapping are a = %d b = %d' % (a, b))\n", "\n", "swap (a, b)\n", "\n", "print ('In main the values after swapping are a = %d b = %d' % (a, b))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number: 15\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number: 27\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "In main the original values are a = 15 b = 27\n", "In main the address of a is f and address of b is 1b\n", "In swap the address in a is f and b is 1b\n", "The values after swapping are a = 27 b = 15\n", "In main the values after swapping are a = 15 b = 27\n" ] } ], "prompt_number": 4 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.5, Page number: 148" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number: '))\n", "b = int(raw_input('Enter second number: '))\n", "\n", "# Function declaration, calculation and result\n", "print ('In main the value of a = %d b = %d' % (a, b))\n", "\n", "def doooo (a, b) :\n", " a = a+10\n", " b = b+10\n", "\n", "doooo (a, b)\n", "\n", "print ('In main the value of a = %d b = %d' % (a, b))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number: 5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number: 7\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "In main the value of a = 5 b = 7\n", "In main the value of a = 5 b = 7\n" ] } ], "prompt_number": 5 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.6, Page number: 150" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number: '))\n", "b = int(raw_input('Enter second number: '))\n", "\n", "# Function declaration, calculation and result\n", "print ('In main the value of a = %d b = %d' % (a, b))\n", "print ('In main the addresses are a = %s b = %s' % (hex(id(a)), hex(id(b))))\n", "\n", "def doooo (a, b) :\n", " print ('In doooo the addresses are a = %s b = %s' % (hex(id(a)), hex(id(b))))\n", " a = a+10\n", " b = b+10\n", "\n", "doooo (a, b)\n", "\n", "print ('In main the value of a = %d b = %d' % (a, b))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number: 5\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number: 7\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "In main the value of a = 5 b = 7\n", "In main the addresses are a = 0x1b49138 b = 0x1b49108\n", "In doooo the addresses are a = 0x1b49138 b = 0x1b49108\n", "In main the value of a = 5 b = 7\n" ] } ], "prompt_number": 6 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.7, Page number: 152" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number '))\n", "b = int(raw_input('Enter second number '))\n", "\n", "# Function declaration, calculation and result\n", "def add (a, b) :\n", " x = a+b\n", " return x\n", "\n", "som = add (a, b)\n", "\n", "print ('The sum of %d + %d = %d' % (a, b, som))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number 2\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number 3\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "The sum of 2 + 3 = 5\n" ] } ], "prompt_number": 7 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.8, Page number: 154" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number '))\n", "b = int(raw_input('Enter second number '))\n", "\n", "# Function declaration, calculation and result\n", "def greater (a, b) :\n", " if a>b :\n", " big = a\n", " else :\n", " big = b\n", " return big\n", "\n", "great = greater (a, b)\n", "\n", "print ('The greater number is %d' % great)" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number 45\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number 23\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "The greater number is 45\n" ] } ], "prompt_number": 8 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.9, Page number: 156" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "a = int(raw_input('Enter first number '))\n", "b = int(raw_input('Enter second number '))\n", "c = int(raw_input('Enter third number '))\n", "\n", "# Function declaration, calculation and result\n", "def greater (a, b, c) :\n", " if a>b :\n", " if a>c :\n", " big = a\n", " else :\n", " big = c\n", " else :\n", " if b>c :\n", " big = b\n", " else :\n", " big = c\n", " return big\n", "\n", "great = greater (a, b, c)\n", "\n", "print ('The greatest number is %d' % great)" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter first number 45\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter second number 190\n" ] }, { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter third number 128\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "The greatest number is 190\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.10, Page number: 158" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "n = int(raw_input('Enter any number '))\n", "\n", "# Function declaration, calculation and result\n", "def summate (n) :\n", " i = 1\n", " total = 0\n", " while i <= n :\n", " total = total + i\n", " i = i+1\n", " return total\n", "\n", "sumn = summate (n)\n", "\n", "print ('Sum of first %d natural numbers is %d' % (n, sumn))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter any number 5\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "Sum of first 5 natural numbers is 15\n" ] } ], "prompt_number": 1 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.11, Page number: 160" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "n = int(raw_input('Enter any number '))\n", "\n", "# Function declaration, calculation and result\n", "def sumofdigit (n) :\n", " sum = 0\n", " while n > 0 :\n", " sum = sum + n%10\n", " n = n/10\n", " return sum\n", "\n", "result = sumofdigit (n)\n", "\n", "print ('Sum of digits of %d is %d' % (n, result))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter any number 7162\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "Sum of digits of 7162 is 16\n" ] } ], "prompt_number": 3 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.12, Page number: 161" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "n = int(raw_input('Enter any number '))\n", "sum = n\n", "\n", "# Function declaration, calculation and result\n", "def sumofdigit (n, sum) :\n", " while sum>=10 :\n", " sum = 0\n", " while n>0 :\n", " sum = sum + n%10\n", " n = n/10\n", " n = sum\n", " return sum\n", "\n", "result = sumofdigit (n, sum)\n", "\n", "print ('Sum of digits of %d is %d' % (n, result))" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter any number 7162\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "Sum of digits of 7162 is 7\n" ] } ], "prompt_number": 4 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.13, Page number: 163" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "n = int(raw_input('Enter any number '))\n", "\n", "# Function declaration, calculation and result\n", "def checkprime (n) :\n", " flag = 1\n", " i = 2\n", " while i<n and flag :\n", " if n%i == 0 :\n", " flag = 0\n", " i = i+1\n", " return flag\n", "\n", "result = checkprime (n)\n", "\n", "if result :\n", " print ('%d is Prime ' % n)\n", "else :\n", " print ('%d is Composite ' % n)" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter any number 41\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "41 is Prime \n" ] } ], "prompt_number": 6 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.14, Page number: 165" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "n = int(raw_input('Enter any number '))\n", "\n", "# Function declaration, calculation and result\n", "def checkprime (n) :\n", " for num in range (2, n+1) :\n", " flag = 1\n", " for i in range (2, num) :\n", " if num % i == 0 : \n", " flag = 0\n", " if flag :\n", " print ('%d ' % num),\n", "\n", "checkprime (n)" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter any number 11\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "2 3 5 7 11 \n" ] } ], "prompt_number": 8 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.15, Page number: 167" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "n = int(raw_input('Enter any number '))\n", "\n", "# Function declaration, calculation and result\n", "def makethird (n) :\n", " first = 0\n", " second = 1\n", " count = 3\n", " print ('%d terms of Fibonacci series are ' % n)\n", " print ('%d %d ' % (first, second)),\n", " while count<=n :\n", " third = first + second\n", " first = second\n", " second = third\n", " print (' %d ' % third),\n", " count = count + 1\n", "\n", "makethird (n)" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter any number 10\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "10 terms of Fibonacci series are \n", "0 1 1 2 3 5 8 13 21 34 \n" ] } ], "prompt_number": 9 }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Example 5.16, Page number: 169" ] }, { "cell_type": "code", "collapsed": false, "input": [ "# Variable declaration\n", "n = int(raw_input('Enter any number '))\n", "\n", "# Function declaration, calculation and result\n", "def makethird (n) :\n", " first = 0\n", " second = 1\n", " third = 0\n", " print ('Fibonacci series up to %d is ' % n)\n", " print first,\n", " while third<=n :\n", " print (' %d ' % second),\n", " third = first + second\n", " first = second\n", " second = third\n", "\n", "makethird (n)" ], "language": "python", "metadata": {}, "outputs": [ { "name": "stdout", "output_type": "stream", "stream": "stdout", "text": [ "Enter any number 100\n" ] }, { "output_type": "stream", "stream": "stdout", "text": [ "Fibonacci series up to 100 is \n", "0 1 1 2 3 5 8 13 21 34 55 89 \n" ] } ], "prompt_number": 9 } ], "metadata": {} } ] }