diff options
Diffstat (limited to 'Structured_Programing_with_C++/Chapter7.ipynb')
| -rwxr-xr-x | Structured_Programing_with_C++/Chapter7.ipynb | 478 |
1 files changed, 478 insertions, 0 deletions
diff --git a/Structured_Programing_with_C++/Chapter7.ipynb b/Structured_Programing_with_C++/Chapter7.ipynb new file mode 100755 index 00000000..c4850700 --- /dev/null +++ b/Structured_Programing_with_C++/Chapter7.ipynb @@ -0,0 +1,478 @@ +{
+ "metadata": {
+ "name": "",
+ "signature": "sha256:81ebacbcf46be2a85cdba0d8109c34324595901036a67c9025bbb5cab58aa894"
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+ {
+ "cells": [
+ {
+ "cell_type": "heading",
+ "level": 1,
+ "metadata": {},
+ "source": [
+ "Chapter 7 : Files"
+ ]
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7.1, Page No 157"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "outfile = open(\"prodfile1.txt\",\"w\")\n",
+ "cProd = raw_input(\"Enter product, (only Enter to exit:\")\n",
+ "while (len(cProd) > 0):\n",
+ " outfile.writelines(cProd)\n",
+ " outfile.writelines(\"\\n\")\n",
+ " cProd = raw_input(\"Enter product, (only Enter to exit:\")\n",
+ "outfile.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product, (only Enter to exit:wheel\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product, (only Enter to exit:handlebars\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product, (only Enter to exit:saddle\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product, (only Enter to exit:bike\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product, (only Enter to exit:moped\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product, (only Enter to exit:\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Examle 7.2 Page No 159"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "infile = open(\"prodfile1.txt\",\"r\")\n",
+ "while (1):\n",
+ " cProd = infile.readline()\n",
+ " if(cProd):\n",
+ " print cProd\n",
+ " else:\n",
+ " break\n",
+ "infile.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "wheel\n",
+ "\n",
+ "handlebars\n",
+ "\n",
+ "saddle\n",
+ "\n",
+ "bike\n",
+ "\n",
+ "moped\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7.3, Page No 160"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "cProd = raw_input(\"Enter new product \")\n",
+ "outfile = open(\"prodfile.txt1\",\"a\")\n",
+ "outfile.writelines(cProd)\n",
+ "outfile.close() "
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter new product Spoke\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7.4, Page No 161"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "iProdId = 1\n",
+ "outfile = open(\"prodfile.txt\",\"w\")\n",
+ "while (iProdId != 0):\n",
+ " iProdId = int(raw_input(\"Enter product id: \"))\n",
+ " dPrice = float(raw_input(\"...and price: \"))\n",
+ " if(iProdId > 0):\n",
+ " outfile.writelines(str(iProdId) + '\\n' + str(dPrice) + '\\n')\n",
+ "outfile.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product id: 2345\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "...and price: 245.5\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product id: 4512\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "...and price: 450.2\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product id: 3902\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "...and price: 320.7\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product id: 2478\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "...and price: 75.9\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product id: 0\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "...and price: 0\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7.5, Page No 163"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "iFound = 0\n",
+ "infile = open(\"prodfile.txt\",\"r\")\n",
+ "iSrch = int(raw_input(\"Enter product id: \"))\n",
+ "while(1):\n",
+ " iProdId = infile.readline()\n",
+ " if(iProdId == \"\"):\n",
+ " break\n",
+ " iProdId = int(iProdId)\n",
+ " dPrice = float(infile.readline())\n",
+ " if(iProdId == iSrch):\n",
+ " print \"The price is:\" , dPrice\n",
+ " iFound = 1\n",
+ " break\n",
+ "if(not iFound):\n",
+ " print \"Product missing\"\n",
+ "infile.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Enter product id: 1234\n"
+ ]
+ },
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Product missing\n"
+ ]
+ }
+ ],
+ "prompt_number": 2
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7.6, Page No 166"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "def sort(cList,n):\n",
+ " for v in range(0,n-1):\n",
+ " for h in range(v+1,n):\n",
+ " if(cList[h]<cList[v]):\n",
+ " temp = cList[v]\n",
+ " cList[v] = cList[h]\n",
+ " cList[h] = temp\n",
+ "i = 0\n",
+ "infile = open(\"prodfile1.txt\",\"r\")\n",
+ "cProd = infile.readlines()\n",
+ "infile.close()\n",
+ "while(i < len(cProd)):\n",
+ " i = i + 1\n",
+ "iNo = i\n",
+ "sort(cProd,iNo)\n",
+ "for j in range(0,iNo):\n",
+ " print cProd[j]"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Bike\n",
+ "\n",
+ "Handlebars\n",
+ "\n",
+ "Moped\n",
+ "\n",
+ "Saddle\n",
+ "\n",
+ "Spoke\n",
+ "\n",
+ "Wheel\n",
+ "\n"
+ ]
+ }
+ ],
+ "prompt_number": 5
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7.7, Page No 169"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import os\n",
+ "infile = open(\"prodfile.txt\",\"r\")\n",
+ "outfile = open(\"temp.txt\",\"w\")\n",
+ "iSrch = int(raw_input(\"Specify product id: \"))\n",
+ "while(1):\n",
+ " iProdId = infile.readline()\n",
+ " if(iProdId == \"\"):\n",
+ " break\n",
+ " iProdId = int(iProdId)\n",
+ " dPrice = float(infile.readline())\n",
+ " if(iProdId == iSrch):\n",
+ " dPrice = float(raw_input(\"Specify the new price: \"))\n",
+ " outfile.writelines(str(iProdId) + '\\n' + str(dPrice) + '\\n')\n",
+ "infile.close()\n",
+ "outfile.close()\n",
+ "os.remove(\"prodfile.txt\")\n",
+ "os.rename(\"temp.txt\",\"prodfile.txt\")"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Specify product id: 2345\n"
+ ]
+ },
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Specify the new price: 33.33\n"
+ ]
+ }
+ ],
+ "prompt_number": 9
+ },
+ {
+ "cell_type": "heading",
+ "level": 2,
+ "metadata": {},
+ "source": [
+ "Example 7.8, Page No 171"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [
+ "import os\n",
+ "cNewName = raw_input(\"Specify new file name: \")\n",
+ "infile = open(\"prodfile.txt\",\"r\")\n",
+ "outfile = open(cNewName,\"w\")\n",
+ "if(not os.path.exists(cNewName)):\n",
+ " print \"The file could not be created\"\n",
+ "outfile.writelines(infile.readlines())\n",
+ "infile.close()\n",
+ "outfile.close()"
+ ],
+ "language": "python",
+ "metadata": {},
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "stream": "stdout",
+ "text": [
+ "Specify new file name: tryal.txt\n"
+ ]
+ }
+ ],
+ "prompt_number": 3
+ },
+ {
+ "cell_type": "code",
+ "collapsed": false,
+ "input": [],
+ "language": "python",
+ "metadata": {},
+ "outputs": []
+ }
+ ],
+ "metadata": {}
+ }
+ ]
+}
\ No newline at end of file |