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Diffstat (limited to 'C++_Programming_In_Easy_Steps/Chapter5.ipynb')
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diff --git a/C++_Programming_In_Easy_Steps/Chapter5.ipynb b/C++_Programming_In_Easy_Steps/Chapter5.ipynb new file mode 100755 index 00000000..5f544b56 --- /dev/null +++ b/C++_Programming_In_Easy_Steps/Chapter5.ipynb @@ -0,0 +1,381 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:be4a857e05d2149d20f6d26486c5784a7f1b2096e43de372a2b4b95639d8b93a"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 5 : Reading and writing files"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.1, Page No 81"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "poem = [\"\\n\\tI never saw a man who looked\"]\n",
+ "poem.append(\"\\n\\tWith such a wistful eye\")\n",
+ "poem.append(\"\\n\\tUpon that little tent of blue\")\n",
+ "poem.append(\"\\n\\tWhich prisoners call the sky\")\n",
+ "try:\n",
+ " writer = open(\"poem.txt\",\"w\")\n",
+ " if(not isinstance(writer,file)):\n",
+ " print \"Error opening file for output\"\n",
+ " writer.writelines(poem)\n",
+ " writer.close()\n",
+ "except IOError:\n",
+ " print \"Error opening file for output\"\n",
+ "\"\"\"\n",
+ "Out put Text File :- poem.txt\n",
+ "\n",
+ " I never saw a man who looked\n",
+ " With such a wistful eye\n",
+ " Upon that little tent of blue\n",
+ " Which prisoners call the sky\n",
+ " The Ballad of Reading Gaol\n",
+ " Oscar Wilde 1898\n",
+ " \n",
+ "\"\"\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.2, Page No 83"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "info = \"\\n\\tThe Ballad of Reading Gaol\"\n",
+ "info = info + \"\\n\\t\\t\\tOscar Wilde 1898\" #There is no append for string in python\n",
+ "try:\n",
+ " writer = open(\"poem.txt\",\"a\")\n",
+ " if(not isinstance(writer,file)):\n",
+ " print \"Error opening file for output\"\n",
+ " writer.writelines(info)\n",
+ " writer.close()\n",
+ "except IOError:\n",
+ " print \"Error opening file for output\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [],
+ "prompt_number": 6
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.3, Page No 84"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "try:\n",
+ " reader = open(\"poem.txt\",\"r\")\n",
+ " if(not isinstance(reader,file)):\n",
+ " print \"Error opening input file\"\n",
+ " i = 0\n",
+ " while(1):\n",
+ " c = reader.read(1)\n",
+ " if c == \"\":\n",
+ " break\n",
+ " else:\n",
+ " print c,\n",
+ " i= i + 1 \n",
+ " reader.close()\n",
+ " print \"\\nIterations: \",i\n",
+ "except IOError:\n",
+ " print \"Error opening input file\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "\n",
+ "\tI n e v e r s a w a m a n w h o l o o k e d \n",
+ "\tW i t h s u c h a w i s t f u l e y e \n",
+ "\tU p o n t h a t l i t t l e t e n t o f b l u e \n",
+ "\tW h i c h p r i s o n e r s c a l l t h e s k y \n",
+ "\tT h e B a l l a d o f R e a d i n g G a o l \n",
+ "\t\t\tO s c a r W i l d e 1 8 9 8 \n",
+ "Iterations: 164\n"
+ ]
+ }
+ ],
+ "prompt_number": 7
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.4, Page No 86"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "# this program gives output same as book program but logic is different because some of functions are not available in python\n",
+ "RANGE = 12\n",
+ "tab = range(RANGE)\n",
+ "i = 0\n",
+ "j = 1\n",
+ "t = \"\"\n",
+ "try:\n",
+ " reader = open(\"records.txt\",\"r\")\n",
+ " if(not isinstance(reader,file)):\n",
+ " print \"Error opening input file\"\n",
+ " while(1):\n",
+ " c = reader.read(1)\n",
+ " if c == \"\":\n",
+ " break\n",
+ " else:\n",
+ " t = t + c\n",
+ " if c == '\\t':\n",
+ " tab[i] = t\n",
+ " t = \"\"\n",
+ " i = i + 1\n",
+ " elif c == '\\n':\n",
+ " tab[i] = t\n",
+ " t = \"\"\n",
+ " i = i + 1\n",
+ " elif i == RANGE-1:\n",
+ " tab[i] = t\n",
+ " reader.close()\n",
+ " i= 0;\n",
+ " while i < RANGE:\n",
+ " print \"Record Number: \",j\n",
+ " j = j + 1\n",
+ " print \"Forename: \",tab[i]\n",
+ " i = i + 1\n",
+ " print \"Surname: \",tab[i]\n",
+ " i = i + 1\n",
+ " print \"Department: \",tab[i]\n",
+ " i = i + 1\n",
+ " print \"Telephone: \",tab[i]\n",
+ " i = i + 1\n",
+ "except IOError:\n",
+ " print \"Error opening input file\"\n",
+ "\n",
+ "\"\"\"\n",
+ " INPUT FILE :- records.txt\n",
+ " \n",
+ " John Smith Sales 555-1234\n",
+ " Mary Jones Wages 555-9876\n",
+ " Paul Harris Accts 555-4321\n",
+ " \n",
+ "\"\"\""
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Record Number: 1\n",
+ "Forename: John\t\n",
+ "Surname: Smith\t\n",
+ "Department: Sales\t\n",
+ "Telephone: 555-1234\n",
+ "\n",
+ "Record Number: 2\n",
+ "Forename: Mary\t\n",
+ "Surname: Jones\t\n",
+ "Department: Wages\t\n",
+ "Telephone: 555-9876\n",
+ "\n",
+ "Record Number: 3\n",
+ "Forename: Paul\t\n",
+ "Surname: Harris\t\n",
+ "Department: Accts\t\n",
+ "Telephone: 555-4321\n"
+ ]
+ }
+ ],
+ "prompt_number": 24
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.5, Page No 89"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "isTrue = 1\n",
+ "num = 255\n",
+ "for i in range(0,40):\n",
+ " print \".\",\n",
+ "print \"Output\"\n",
+ "print \"Pi: \",\"3.1415926536\"\n",
+ "print isTrue,\":\",bool(isTrue)\n",
+ "print num,\":\",\"{:01X}\".format(num)"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ " . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output\n",
+ "Pi: 3.1415926536\n",
+ "1 : True\n",
+ "255 : FF\n"
+ ]
+ }
+ ],
+ "prompt_number": 16
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.6, Page No 91"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "try:\n",
+ " for number in range(1,21):\n",
+ " if number > 4:\n",
+ " raise Exception(number)\n",
+ " else:\n",
+ " print \"Number: \",number\n",
+ "except:\n",
+ " print \"Exception at: \",number"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Number: 1\n",
+ "Number: 2\n",
+ "Number: 3\n",
+ "Number: 4\n",
+ "Exception at: 5\n"
+ ]
+ }
+ ],
+ "prompt_number": 20
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.7, Page No 92"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import sys\n",
+ "lang = \"C++\"\n",
+ "try:\n",
+ " lang.erase(4,6)\n",
+ "except:\n",
+ " print \"Exception\",sys.exc_info()[0]\n",
+ "# There is no support for erse method in python"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Exception <type 'exceptions.AttributeError'>\n"
+ ]
+ }
+ ],
+ "prompt_number": 23
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 5.8, Page No 94"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "#there is no replace or resize method in python\n",
+ "import sys\n",
+ "lang = \"C++\"\n",
+ "num = 1000000000\n",
+ "try:\n",
+ " lang.replace(lang,\"C\",\"1\")\n",
+ " lang.resize(3*num)\n",
+ " reader = open(\"nonsuch.txt\",\"r\")\n",
+ " print \"Program continues...\"\n",
+ "except:\n",
+ " print sys.exc_info()[0]\n",
+ " print \"Program terminated.\"\n",
+ "#python dose not support much more exceptions"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "<type 'exceptions.TypeError'>\n",
+ "Program terminated.\n"
+ ]
+ }
+ ],
+ "prompt_number": 29
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
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