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Diffstat (limited to 'Let_us_C/chapter-9.ipynb')
| -rw-r--r-- | Let_us_C/chapter-9.ipynb | 616 |
1 files changed, 616 insertions, 0 deletions
diff --git a/Let_us_C/chapter-9.ipynb b/Let_us_C/chapter-9.ipynb new file mode 100644 index 00000000..1f588a47 --- /dev/null +++ b/Let_us_C/chapter-9.ipynb @@ -0,0 +1,616 @@ +{
+ "metadata": {
+ "name": "chapter-9.ipynb"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h1>Chapter 9: Puppetting On Strings <h1>"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Print String , Page number: 329<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate printing of a string'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "name= \"Klinsman\" # character array or string\n",
+ "i = 0\n",
+ "\n",
+ "#while loop for printing\n",
+ "while i <= 7 :\n",
+ " print name[i] \n",
+ " i = i + 1\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "K\n",
+ "l\n",
+ "i\n",
+ "n\n",
+ "s\n",
+ "m\n",
+ "a\n",
+ "n\n"
+ ]
+ }
+ ],
+ "prompt_number": 1
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Print String, Page number: 330<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate printing of a string'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "name= \"Klinsman\\0\" # character array or string\n",
+ "i = 0\n",
+ "\n",
+ "#while loop for printing\n",
+ "while (name[i] != '\\0') :\n",
+ " print name[i]\n",
+ " i = i + 1\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "K\n",
+ "l\n",
+ "i\n",
+ "n\n",
+ "s\n",
+ "m\n",
+ "a\n",
+ "n\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Print String Using Pointer, Page number: 330<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to print a string using a pointer to access the array elements'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "name = \"Klinsman\\0\" # string or character array\n",
+ "i = 0\n",
+ "ptr = name[i] # store base address of string\n",
+ "\n",
+ "#Result\n",
+ "while ptr != '\\0':\n",
+ " print ptr\n",
+ " i = i+1\n",
+ " ptr = name[i]\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "K\n",
+ "l\n",
+ "i\n",
+ "n\n",
+ "s\n",
+ "m\n",
+ "a\n",
+ "n\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>strlen Function, Page number: 336<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate the 'strlen' function '''\n",
+ "\n",
+ "\n",
+ "#Variable declaration\n",
+ "arr = \"Bamboozled\" # character array or string\n",
+ "\n",
+ "#string length function\n",
+ "len1 = len(arr) \n",
+ "len2 = len( \"Humpty Dumpty\" )\n",
+ "\n",
+ "#Result\n",
+ "print \"string = %s length = %d\" %( arr, len1 )\n",
+ "print \"string = %s length = %d\" %(\"Humpty Dumpty\", len2 )\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "string = Bamboozled length = 10\n",
+ "string = Humpty Dumpty length = 13\n"
+ ]
+ }
+ ],
+ "prompt_number": 4
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>xstrlen Function, Page number: 337<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate a function that\n",
+ "counts the number of characters present in a string'''\n",
+ "\n",
+ "#Function definition\n",
+ "def xstrlen(s):\n",
+ " length = 0\n",
+ " while ( s[length] != '\\0' ):\n",
+ " length += 1\n",
+ " return length \n",
+ "\n",
+ "#Variable declaration\n",
+ "arr = \"Bamboozled\\0\" # character array or string\n",
+ "\n",
+ "#Function calls\n",
+ "len1 = xstrlen(arr) \n",
+ "len2 = xstrlen( \"Humpty Dumpty\\0\" )\n",
+ "\n",
+ "#Result\n",
+ "print \"string = %s length = %d\" %( arr, len1 )\n",
+ "print \"string = %s length = %d\" %(\"Humpty Dumpty\\0\", len2 )\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "string = Bamboozled\u0000 length = 10\n",
+ "string = Humpty Dumpty\u0000 length = 13\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>strcpy Function, Page number: 338<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate the 'strcpy' function '''\n",
+ "\n",
+ "\n",
+ "#Variable declaration\n",
+ "source = \"Sayonara\" \n",
+ "target = [] \n",
+ "\n",
+ "#strcpy function\n",
+ "import copy\n",
+ "target = copy.copy(source)\n",
+ "\n",
+ "#Result\n",
+ "print \"source string = \", source \n",
+ "print \"target string = \", target \n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "source string = Sayonara\n",
+ "target string = Sayonara\n"
+ ]
+ }
+ ],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>xstrcpy Function, Page number: 339<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate a function that\n",
+ "copies the contents of one string into another'''\n",
+ "\n",
+ "#Function definition\n",
+ "def xstrcpy (t,s):\n",
+ " i = 0\n",
+ " while ( s[i] != '\\0' ):\n",
+ " t = t + s[i]\n",
+ " i = i + 1\n",
+ " return t\n",
+ " \n",
+ "#Variable declaration\n",
+ "source = \"Sayonara\\0\" \n",
+ "target = ''\n",
+ "\n",
+ "target = xstrcpy ( target, source ) # function call\n",
+ "\n",
+ "#Result\n",
+ "print \"source string = \", source \n",
+ "print \"target string = \", target "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "source string = Sayonara\u0000\n",
+ "target string = Sayonara\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>strcat Function, Page number: 342<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate the 'strcat' function'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "source = \"Folks!\" \n",
+ "target = \"Hello\"\n",
+ " \n",
+ "target = target + source # string concatenation\n",
+ "#Result\n",
+ "print \"source string = \", source \n",
+ "print \"target string = \", target \n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "source string = Folks!\n",
+ "target string = HelloFolks!\n"
+ ]
+ }
+ ],
+ "prompt_number": 8
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>strcmp Function, Page number: 343<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to demonstrate the 'strcmp' function'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "string1 = \"Jerry\\0\" \n",
+ "string2 = \"Ferry\\0\"\n",
+ "\n",
+ "#Function definition\n",
+ "def strcmp (string1 , string2):\n",
+ " if (string1 == string2):\n",
+ " v = 0 #If the two strings are identical, strcmp returns a value zero\n",
+ " return v\n",
+ " else:\n",
+ " n = 0\n",
+ " while ( string1[n]):\n",
+ " if ( string1[n] == string2[n]):\n",
+ " n = n + 1\n",
+ " continue\n",
+ " else:\n",
+ " v = ord(string1[n]) - ord(string2[n]) #returns the numeric difference between the ASCII values of the first non-matching pairs of characters\n",
+ " return v\n",
+ " return v\n",
+ "\n",
+ "#Function call\n",
+ "i = strcmp ( string1, \"Jerry\\0\" ) \n",
+ "j = strcmp ( string1, string2 ) \n",
+ "k = strcmp ( string1, \"Jerry boy\\0\" )\n",
+ "\n",
+ "#Result\n",
+ "print i,j,k"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "0 4 -32\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Two Dimensional Array of Characters, Page number: 344<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program asks you to type your name. When you do so, it checks your\n",
+ "name against a master list to see if you are worthy of\n",
+ "entry to the palace'''\n",
+ "\n",
+ "\n",
+ "#Function definition\n",
+ "def strcmp (string1 , string2):\n",
+ " if (string1 == string2):\n",
+ " v = 0 #If the two strings are identical, strcmp returns a value zero\n",
+ " return v\n",
+ " else:\n",
+ " n = 0\n",
+ " while ( string1[n]):\n",
+ " if ( string1[n] == string2[n]):\n",
+ " n = n + 1\n",
+ " continue\n",
+ " else:\n",
+ " v = ord(string1[n]) - ord(string2[n]) #returns the numeric difference between the ASCII values of the first non-matching pairs of characters\n",
+ " return v\n",
+ " return v\n",
+ "\n",
+ "#Variable declaration\n",
+ "FOUND = 1\n",
+ "NOTFOUND = 0\n",
+ "masterlist =[\"akshay\",\"parag\",\"raman\",\"srinivas\",\"gopal\",\"rajesh\"]\n",
+ "yourname = []\n",
+ "flag = NOTFOUND\n",
+ "\n",
+ "#Input from user\n",
+ "#yourname = raw_input(\"Enter your name: \")\n",
+ "yourname = \"Akshatha\"\n",
+ "\n",
+ "#Checking in the master list\n",
+ "for i in range(0,6):\n",
+ " a = strcmp ( masterlist[i], yourname )\n",
+ " if a == 0:\n",
+ " print \"Welcome, you can enter the palace\" \n",
+ " flag = FOUND\n",
+ " break\n",
+ " \n",
+ "if flag == NOTFOUND :\n",
+ " print \"Sorry, you are a trespasser\" "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Sorry, you are a trespasser\n"
+ ]
+ }
+ ],
+ "prompt_number": 10
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Exchange Names using 2-D Array of Characters, Page number: 348<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to exchange names using 2-D array of characters'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "names = [\"akshay\\0\\0\\0\",\"parag\\0\\0\\0\\0\",\"raman\\0\\0\\0\\0\",\"srinivas\\0\",\"gopal\\0\\0\\0\\0\",\"rajesh\\0\\0\\0\"]\n",
+ "\n",
+ "#Initial condition\n",
+ "print \"Original: \", names[2], names[3] \n",
+ "\n",
+ "#Exchanging names\n",
+ "for i in range(0,9):\n",
+ " t = names[3][i]\n",
+ " names[3] = names[3][0:i] + names[2][i] + names[3][i+1:]\n",
+ " names[2] = names[2][0:i] + t + names[2][i+1:]\n",
+ " \n",
+ "\n",
+ "#Result \n",
+ "print \"New: \", names[2], names[3] "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Original: raman\u0000\u0000\u0000\u0000 srinivas\u0000\n",
+ "New: srinivas\u0000 raman\u0000\u0000\u0000\u0000\n"
+ ]
+ }
+ ],
+ "prompt_number": 11
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Exchange Names using Array of Pointers to Strings, Page number: 349<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to exchange names using 2-D array of characters'''\n",
+ "\n",
+ "#Variable declaration\n",
+ "names = [\"akshay\\0\\0\\0\",\"parag\\0\\0\\0\\0\",\"raman\\0\\0\\0\\0\",\"srinivas\\0\",\"gopal\\0\\0\\0\\0\",\"rajesh\\0\\0\\0\"]\n",
+ "\n",
+ "#Initial condition\n",
+ "print \"Original: \", names[2], names[3] \n",
+ "\n",
+ "#Exchanging names\n",
+ "temp = names[2] \n",
+ "names[2] = names[3] \n",
+ "names[3] = temp \n",
+ "\n",
+ "#Result \n",
+ "print \"New: \", names[2], names[3] \n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Original: raman\u0000\u0000\u0000\u0000 srinivas\u0000\n",
+ "New: srinivas\u0000 raman\u0000\u0000\u0000\u0000\n"
+ ]
+ }
+ ],
+ "prompt_number": 12
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "<h3>Solution, Page number: 351<h3>"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "'''Program to illustrate the solution to the problem of limitation\n",
+ "of Array of Pointers to Strings'''\n",
+ "\n",
+ "import copy\n",
+ "\n",
+ "#Variable declaration\n",
+ "names = []\n",
+ "n=[\"John\",\"Max\",\"Jim\",\"Tony\",\"Tom\",\"Harry\"]\n",
+ "\n",
+ "for i in range(0,6):\n",
+ " n1 = n[i]\n",
+ " p = copy.copy(n1)\n",
+ " names.append(p) \n",
+ "\n",
+ "for i in range(0,6):\n",
+ " print names[i] \n",
+ "\n"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "John\n",
+ "Max\n",
+ "Jim\n",
+ "Tony\n",
+ "Tom\n",
+ "Harry\n"
+ ]
+ }
+ ],
+ "prompt_number": 15
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |