adding book

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diff --git a/Programming_in_C/Chapter_19.ipynb b/Programming_in_C/Chapter_19.ipynb
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+{
+ "metadata": {
+  "name": "Chapter XIX"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "heading",
+     "level": 1,
+     "metadata": {},
+     "source": [
+      "Chapter 19: Object-oriented programming"
+     ]
+    },
+    {
+     "cell_type": "heading",
+     "level": 3,
+     "metadata": {},
+     "source": [
+      "Program 19.1, Page number: 414"
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "#19.1.py\n",
+      "#Working with fractions in python\n",
+      "\n",
+      "#Class declaration\n",
+      "class Fraction:\n",
+      "        def __init__(self):                     #Class constructor\n",
+      "                self.numerator=0\n",
+      "                self.denominator=0\n",
+      "\n",
+      "#Main()\n",
+      "def main():\n",
+      "\n",
+      "        #Creating instance\n",
+      "        myFract=Fraction()\n",
+      "        myFract.numerator=1\n",
+      "        myFract.denominator=3\n",
+      "\n",
+      "        print(\"The Fraction is {0}/{1}\".format(myFract.numerator,myFract.denominator))\n",
+      "\n",
+      "#Setting top level conditional script\n",
+      "if __name__=='__main__':\n",
+      "        main()"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "output_type": "stream",
+       "stream": "stdout",
+       "text": [
+        "The Fraction is 1/3\n"
+       ]
+      }
+     ],
+     "prompt_number": 1
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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