{
 "metadata": {
  "name": "ch9"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 9: Standard C++ strings"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9.2, Page no: 214"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "while True:\n",
      "    try:\n",
      "        n = int(raw_input())\n",
      "        print \"n = \" , n \n",
      "    except:\n",
      "        break"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "46\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "n =  46\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "22\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "n =  22\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "44\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "n =  44\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "66\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "n =  66\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "88\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "n =  88\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "33,\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9.4, Page no: 215"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "king = [] # defines king to be an array \n",
      "n=0\n",
      "while True:\n",
      "    name = raw_input()\n",
      "    if len(name) < 1:\n",
      "        break\n",
      "    king.append(name)\n",
      "    n += 1\n",
      "# now n == the number of names read\n",
      "for i in range(n):\n",
      "    print '\\t' , i+1 , \". \" , king[i] "
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Kenneth II (971-995)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Constantine III (995-997)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Kenneth III (997-1005)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Malcolm II (1005-1034)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Duncan I (1034-1040)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Macbeth (1040-1057)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Lulach (1057-1058)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Malcolm III (1058-1093)\n"
       ]
      },
      {
       "name": "stdout",
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\n"
       ]
      },
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\t1 .  Kenneth II (971-995)\n",
        "\t2 .  Constantine III (995-997)\n",
        "\t3 .  Kenneth III (997-1005)\n",
        "\t4 .  Malcolm II (1005-1034)\n",
        "\t5 .  Duncan I (1034-1040)\n",
        "\t6 .  Macbeth (1040-1057)\n",
        "\t7 .  Lulach (1057-1058)\n",
        "\t8 .  Malcolm III (1058-1093)\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9.6, Page no: 217"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "'''\n",
      "Note : you need input.txt in same directory for the program to run without any errors.\n",
      "'''\n",
      "\n",
      "infile = open(\"input.txt\",\"r\")\n",
      "outfile = open(\"output.txt\",\"w\")\n",
      "\n",
      "for i in infile:\n",
      "    s = i.title()\n",
      "    outfile.write(s)\n",
      "\n",
      "infile.close()\n",
      "outfile.close()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "IOError",
       "evalue": "[Errno 2] No such file or directory: 'input.txt'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[1;31mIOError\u001b[0m                                   Traceback (most recent call last)",
        "\u001b[1;32m<ipython-input-3-60ee428ecf4c>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      5\u001b[0m '''\n\u001b[0;32m      6\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 7\u001b[1;33m \u001b[0minfile\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mopen\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"input.txt\"\u001b[0m\u001b[1;33m,\u001b[0m\u001b[1;34m\"r\"\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      8\u001b[0m \u001b[0moutfile\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mopen\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"output.txt\"\u001b[0m\u001b[1;33m,\u001b[0m\u001b[1;34m\"w\"\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      9\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
        "\u001b[1;31mIOError\u001b[0m: [Errno 2] No such file or directory: 'input.txt'"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9.7, Page no: 218"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "'''Note: You need the files - north.dat, south.dat, combined.dat in the same directory for the program to run without any errors'''\n",
      "\n",
      "fin1 = open(\"north.dat\",\"r\")\n",
      "fin2 = open(\"south.dat\",\"r\")\n",
      "fout = open(\"combined.dat\",\"w\")\n",
      "\n",
      "file1 = []\n",
      "file2 = []\n",
      "for i in fin1:\n",
      "    try:\n",
      "        s = i.split(\" \")\n",
      "        for j in s:\n",
      "            file1.append(int(j))\n",
      "    except:\n",
      "        continue\n",
      "    \n",
      "for i in fin2:\n",
      "    try:\n",
      "        s = i.split(\" \")\n",
      "        for j in s:\n",
      "            file2.append(int(j))\n",
      "    except:\n",
      "        continue\n",
      "\n",
      "\n",
      "for i in sorted(file1 + file2):\n",
      "    fout.write(str(i) + \" \")\n",
      "\n",
      "fin1.close()\n",
      "fin2.close()\n",
      "fout.close()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "ename": "IOError",
       "evalue": "[Errno 2] No such file or directory: 'north.dat'",
       "output_type": "pyerr",
       "traceback": [
        "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m\n\u001b[1;31mIOError\u001b[0m                                   Traceback (most recent call last)",
        "\u001b[1;32m<ipython-input-4-e14718f30215>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      3\u001b[0m '''\n\u001b[0;32m      4\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 5\u001b[1;33m \u001b[0mfin1\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mopen\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"north.dat\"\u001b[0m\u001b[1;33m,\u001b[0m\u001b[1;34m\"r\"\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      6\u001b[0m \u001b[0mfin2\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mopen\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"south.dat\"\u001b[0m\u001b[1;33m,\u001b[0m\u001b[1;34m\"r\"\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      7\u001b[0m \u001b[0mfout\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mopen\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m\"combined.dat\"\u001b[0m\u001b[1;33m,\u001b[0m\u001b[1;34m\"w\"\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
        "\u001b[1;31mIOError\u001b[0m: [Errno 2] No such file or directory: 'north.dat'"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9.8, Page no: 219"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "def print_(oss):\n",
      "    print 'oss.str() = \"' , str(oss) , '\"'\n",
      "\n",
      "s=\"ABCDEFG\"\n",
      "n=33\n",
      "x=2.718\n",
      "l = ''\n",
      "print_(l)\n",
      "l += s\n",
      "print_(l)\n",
      "l += ( \" \" + str(n) )\n",
      "print_(l)\n",
      "l += ( \" \" + str(x) )\n",
      "print_(l)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "oss.str() = \"  \"\n",
        "oss.str() = \" ABCDEFG \"\n",
        "oss.str() = \" ABCDEFG 33 \"\n",
        "oss.str() = \" ABCDEFG 33 2.718 \"\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 9.9, Page no: 220"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "\n",
      "\n",
      "def print_(iss,s='',n=0,x=0.0):\n",
      "    print 's = \"' , s , '\", n = ' , n , \", x = \" , x, ', iss.str() = \"' \\\n",
      "                            , iss , '\"' \n",
      "\n",
      "s=\"\"\n",
      "n=0\n",
      "x=0.0\n",
      "l = ''\n",
      "iss = \"ABCDEFG 44 3.14\"\n",
      "print_(iss)\n",
      "s = \"ABCDEFG\"\n",
      "print_(iss,s)\n",
      "n = 44\n",
      "print_(iss,s,n)\n",
      "x = 3.14\n",
      "print_(iss,s,n,x)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "s = \"  \", n =  0 , x =  0.0 , iss.str() = \" ABCDEFG 44 3.14 \"\n",
        "s = \" ABCDEFG \", n =  0 , x =  0.0 , iss.str() = \" ABCDEFG 44 3.14 \"\n",
        "s = \" ABCDEFG \", n =  44 , x =  0.0 , iss.str() = \" ABCDEFG 44 3.14 \"\n",
        "s = \" ABCDEFG \", n =  44 , x =  3.14 , iss.str() = \" ABCDEFG 44 3.14 \"\n"
       ]
      }
     ],
     "prompt_number": 6
    }
   ],
   "metadata": {}
  }
 ]
}