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Diffstat (limited to 'C++_from_the_Ground/Chapter_7(1).ipynb')
| -rw-r--r-- | C++_from_the_Ground/Chapter_7(1).ipynb | 591 |
1 files changed, 521 insertions, 70 deletions
diff --git a/C++_from_the_Ground/Chapter_7(1).ipynb b/C++_from_the_Ground/Chapter_7(1).ipynb index 4e347f41..28829c6d 100644 --- a/C++_from_the_Ground/Chapter_7(1).ipynb +++ b/C++_from_the_Ground/Chapter_7(1).ipynb @@ -1,6 +1,7 @@ { "metadata": { - "name": "Chapter 7" + "name": "", + "signature": "sha256:9a6978851f88c0c91bde88465299d72777f3dae7854964b1cadad7b80092df72" }, "nbformat": 3, "nbformat_minor": 0, @@ -10,24 +11,46 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h1>Chapter 7: Functions,Part One: The Fundamentals<h1>" + "source": [ + "<h1>Chapter 7: Functions,Part One: The Fundamentals<h1>" + ] }, { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.1, Page Number: 129<h3>" + "source": [ + "<h3>Example 7.1, Page Number: 129<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Example of a function'''\n\ndef f1():\n print \"Enter something: \"\n str= \"Hello\" #User-input\n print str\n \n#Variable decleration\nstr=\"This is str in main\"\n\nprint str\nf1() #function call\nprint str", + "input": [ + "\n", + "def f1():\n", + " print \"Enter something: \"\n", + " str= \"Hello\" #User-input\n", + " print str\n", + " \n", + "#Variable decleration\n", + "str=\"This is str in main\"\n", + "\n", + "print str\n", + "f1() #function call\n", + "print str" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "This is str in main\nEnter something: \nHello\nThis is str in main\n" + "text": [ + "This is str in main\n", + "Enter something: \n", + "Hello\n", + "This is str in main\n" + ] } ], "prompt_number": 1 @@ -35,19 +58,44 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.2, Page Number: 130<h3>" + "source": [ + "<h3>Example 7.2, Page Number: 130<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''This program illustrates how variables can be local to a block'''\n\n#Variable decleration\nchoice=0\n\nprint \"(1) add numbers or (2) concatenate strings?: \"\nchoice=2 #User Input taken as 2\n\nif choice==1:\n print \"Enter two numbers: \"\n a=5 #Variable decleration; User Input\n b=7\n print a+b #Result\nelse :\n print \"Enter two strings: \"\n s1=\"Hello\" #Variable decleration; User Input\n s2=\"World\"\n s1+=s2 #Concatenation\n print s1 #Result", + "input": [ + "\n", + "#Variable decleration\n", + "choice=0\n", + "\n", + "print \"(1) add numbers or (2) concatenate strings?: \"\n", + "choice=2 #User Input taken as 2\n", + "\n", + "if choice==1:\n", + " print \"Enter two numbers: \"\n", + " a=5 #Variable decleration; User Input\n", + " b=7\n", + " print a+b #Result\n", + "else :\n", + " print \"Enter two strings: \"\n", + " s1=\"Hello\" #Variable decleration; User Input\n", + " s2=\"World\"\n", + " s1+=s2 #Concatenation\n", + " print s1 #Result" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "(1) add numbers or (2) concatenate strings?: \nEnter two strings: \nHelloWorld\n" + "text": [ + "(1) add numbers or (2) concatenate strings?: \n", + "Enter two strings: \n", + "HelloWorld\n" + ] } ], "prompt_number": 1 @@ -55,19 +103,36 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.3, Page Number: 131<h3>" + "source": [ + "<h3>Example 7.3, Page Number: 131<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''This program illustrates the scope of variables'''\n\n'''This program will give same output for inner and outer i's\n because pyhton doesnt consider the if statment block as a scope'''\n#Variable decleration\ni=10\nj=100\n\nif j>0:\n i=None \n i= j/2\n print \"inner i: \",i #Result\n\nprint \"outer i: \",i #Result", + "input": [ + "\n", + "#Variable decleration\n", + "i=10\n", + "j=100\n", + "\n", + "if j>0:\n", + " i=None \n", + " i= j/2\n", + " print \"inner i: \",i #Result\n", + "\n", + "print \"outer i: \",i #Result" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "inner i: 50\nouter i: 50\n" + "text": [ + "inner i: 50\n", + "outer i: 50\n" + ] } ], "prompt_number": 2 @@ -75,19 +140,32 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.4, Page Number: 132<h3>" + "source": [ + "<h3>Example 7.4, Page Number: 132<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Example for declaring variables anywhere in the program'''\n\na=5 #Variable decleration; user input\n\nb=10 #declaration of another variable; user input\n\n#Result\nprint \"Product: \",a*b", + "input": [ + "\n", + "\n", + "a=5 #Variable decleration; user input\n", + "\n", + "b=10 #declaration of another variable; user input\n", + "\n", + "#Result\n", + "print \"Product: \",a*b" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Product: 50\n" + "text": [ + "Product: 50\n" + ] } ], "prompt_number": 4 @@ -95,19 +173,70 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.5, Page Number: 134<h3>" + "source": [ + "<h3>Example 7.5, Page Number: 134<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''A simple addition drill program.'''\n\nimport random\n\n#Variable decleration\ncount=None\nnum_right=0\n\n#Function for the drill\ndef drill():\n #Generate two numbers between 0 and 99.\n a=random.randint(0,99)\n b=random.randint(0,99)\n #The user gets three tries to get it right.\n for count in range(3):\n print \"What is \",a,\" + \",b,\"? \"\n ans = random.randint(0,200) #user input\n if ans==a+b:\n print \"Right\"\n num_right+=1\n print \"You've used up all your tries.\"\n print \"The answer is \",a+b\n \n#Main function \nprint \"How many practice problems: \"\ncount=2 #User input taken as 2\nnum_right=0\nwhile True:\n drill()\n count-=1\n if(count==0):\n break\n \n#Result\nprint \"You got \",num_right,\" right. \" \n", + "input": [ + "\n", + "\n", + "import random\n", + "\n", + "#Variable decleration\n", + "count=None\n", + "num_right=0\n", + "\n", + "#Function for the drill\n", + "def drill():\n", + " #Generate two numbers between 0 and 99.\n", + " a=random.randint(0,99)\n", + " b=random.randint(0,99)\n", + " #The user gets three tries to get it right.\n", + " for count in range(3):\n", + " print \"What is \",a,\" + \",b,\"? \"\n", + " ans = random.randint(0,200) #user input\n", + " if ans==a+b:\n", + " print \"Right\"\n", + " num_right+=1\n", + " print \"You've used up all your tries.\"\n", + " print \"The answer is \",a+b\n", + " \n", + "#Main function \n", + "print \"How many practice problems: \"\n", + "count=2 #User input taken as 2\n", + "num_right=0\n", + "while True:\n", + " drill()\n", + " count-=1\n", + " if(count==0):\n", + " break\n", + " \n", + "#Result\n", + "print \"You got \",num_right,\" right. \" \n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "How many practice problems: \nWhat is 9 + 89 ? \nWhat is 9 + 89 ? \nWhat is 9 + 89 ? \nYou've used up all your tries.\nThe answer is 98\nWhat is 85 + 98 ? \nWhat is 85 + 98 ? \nWhat is 85 + 98 ? \nYou've used up all your tries.\nThe answer is 183\nYou got 0 right. \n" + "text": [ + "How many practice problems: \n", + "What is 9 + 89 ? \n", + "What is 9 + 89 ? \n", + "What is 9 + 89 ? \n", + "You've used up all your tries.\n", + "The answer is 98\n", + "What is 85 + 98 ? \n", + "What is 85 + 98 ? \n", + "What is 85 + 98 ? \n", + "You've used up all your tries.\n", + "The answer is 183\n", + "You got 0 right. \n" + ] } ], "prompt_number": 5 @@ -115,19 +244,39 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.6, Page Number: 136<h3>" + "source": [ + "<h3>Example 7.6, Page Number: 136<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Pass by reference(pointer) to a function'''\n\nfrom ctypes import *\n\n#Function to change the reference value\ndef f(j):\n j[0]=100 #j is assigned 100\n\n#Variable decleration\ni=c_int(1)\np=pointer(i)\n\n#Calling the function\nf(p) \n\nprint i", + "input": [ + "\n", + "from ctypes import *\n", + "\n", + "#Function to change the reference value\n", + "def f(j):\n", + " j[0]=100 #j is assigned 100\n", + "\n", + "#Variable decleration\n", + "i=c_int(1)\n", + "p=pointer(i)\n", + "\n", + "#Calling the function\n", + "f(p) \n", + "\n", + "print i" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "c_long(100)\n" + "text": [ + "c_long(100)\n" + ] } ], "prompt_number": 5 @@ -135,19 +284,39 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.7, Page Number: 137<h3>" + "source": [ + "<h3>Example 7.7, Page Number: 137<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Pass by reference(pointer) to a function'''\n\nfrom ctypes import *\n\n#Function to change the reference value\ndef f(j):\n j[0]=100 #j is assigned 100\n\n#Variable decleration\ni=c_int(1)\np=pointer(i)\n\n#Calling the function\nf(p) \n\nprint i", + "input": [ + "\n", + "from ctypes import *\n", + "\n", + "#Function to change the reference value\n", + "def f(j):\n", + " j[0]=100 #j is assigned 100\n", + "\n", + "#Variable decleration\n", + "i=c_int(1)\n", + "p=pointer(i)\n", + "\n", + "#Calling the function\n", + "f(p) \n", + "\n", + "print i" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "c_long(100)\n" + "text": [ + "c_long(100)\n" + ] } ], "prompt_number": 6 @@ -155,19 +324,37 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.8, Page Number: 137<h3>" + "source": [ + "<h3>Example 7.8, Page Number: 137<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Calling function with a list(array)'''\n\n#function to print some nos.\ndef display(num):\n for i in range(10):\n print num[i],\n \n#Variable declaration\nt=[]\n\nfor i in range(10):\n t.append(i)\n#Pass list to a function\ndisplay(t)", + "input": [ + "\n", + "#function to print some nos.\n", + "def display(num):\n", + " for i in range(10):\n", + " print num[i],\n", + " \n", + "#Variable declaration\n", + "t=[]\n", + "\n", + "for i in range(10):\n", + " t.append(i)\n", + "#Pass list to a function\n", + "display(t)" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "0 1 2 3 4 5 6 7 8 9\n" + "text": [ + "0 1 2 3 4 5 6 7 8 9\n" + ] } ], "prompt_number": 7 @@ -175,19 +362,39 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.9, Page Number: 138<h3>" + "source": [ + "<h3>Example 7.9, Page Number: 138<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Displaying list without passing the list'''\n\n#Print some nos.\ndef display(num):\n print num,\n\n#Variable declaration\nt=[]\n\nfor i in range(10):\n t.append(i)\n \n#Printing without passing entire list\nfor i in range(10):\n display(t[i])", + "input": [ + "\n", + "\n", + "#Print some nos.\n", + "def display(num):\n", + " print num,\n", + "\n", + "#Variable declaration\n", + "t=[]\n", + "\n", + "for i in range(10):\n", + " t.append(i)\n", + " \n", + "#Printing without passing entire list\n", + "for i in range(10):\n", + " display(t[i])" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "0 1 2 3 4 5 6 7 8 9\n" + "text": [ + "0 1 2 3 4 5 6 7 8 9\n" + ] } ], "prompt_number": 8 @@ -195,19 +402,51 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.10, Page Number: 139<h3>" + "source": [ + "<h3>Example 7.10, Page Number: 139<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to convert each of the array element into its cube'''\n\n#Function to convert into cubes\ndef cube(n,num):\n num-=1\n while num:\n n[num]=n[num]*n[num]*n[num]\n num-=1\n\n#Variable declaration\nnums=[]\n\nfor i in range(10):\n nums.append(i+1)\n \nprint \"Original contents: \",\nfor i in range(10):\n print nums[i],\nprint\n\ncube(nums,10) #Compute cubes\n\n#Result\nprint \"Altered contents: \",\nfor i in range(10):\n print nums[i],", + "input": [ + "\n", + "\n", + "#Function to convert into cubes\n", + "def cube(n,num):\n", + " num-=1\n", + " while num:\n", + " n[num]=n[num]*n[num]*n[num]\n", + " num-=1\n", + "\n", + "#Variable declaration\n", + "nums=[]\n", + "\n", + "for i in range(10):\n", + " nums.append(i+1)\n", + " \n", + "print \"Original contents: \",\n", + "for i in range(10):\n", + " print nums[i],\n", + "print\n", + "\n", + "cube(nums,10) #Compute cubes\n", + "\n", + "#Result\n", + "print \"Altered contents: \",\n", + "for i in range(10):\n", + " print nums[i]," + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Original contents: 1 2 3 4 5 6 7 8 9 10\nAltered contents: 1 8 27 64 125 216 343 512 729 1000\n" + "text": [ + "Original contents: 1 2 3 4 5 6 7 8 9 10\n", + "Altered contents: 1 8 27 64 125 216 343 512 729 1000\n" + ] } ], "prompt_number": 10 @@ -215,19 +454,39 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.11, Page Number: 140<h3>" + "source": [ + "<h3>Example 7.11, Page Number: 140<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to convert a string to uppercase'''\n\nimport string\n\ndef stringupper(str):\n str=string.upper(str) #convert to uppercase\n return str\n\n#Variable declaration \nstr=\"this is a test\"\n\n#Calling the function\nstr=stringupper(str)\n\n#Result\nprint str", + "input": [ + "\n", + "import string\n", + "\n", + "def stringupper(str):\n", + " str=string.upper(str) #convert to uppercase\n", + " return str\n", + "\n", + "#Variable declaration \n", + "str=\"this is a test\"\n", + "\n", + "#Calling the function\n", + "str=stringupper(str)\n", + "\n", + "#Result\n", + "print str" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "THIS IS A TEST\n" + "text": [ + "THIS IS A TEST\n" + ] } ], "prompt_number": 7 @@ -235,19 +494,33 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.12, Page Number: 141<h3>" + "source": [ + "<h3>Example 7.12, Page Number: 141<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to find length of string'''\n\n#Function to fond length\ndef mystrlen(str):\n l=len(str)\n return l\n\n#Result\nprint \"Length of Hello There is: \",\nprint mystrlen(\"Hello There\")", + "input": [ + "\n", + "#Function to fond length\n", + "def mystrlen(str):\n", + " l=len(str)\n", + " return l\n", + "\n", + "#Result\n", + "print \"Length of Hello There is: \",\n", + "print mystrlen(\"Hello There\")" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Length of Hello There is: 11\n" + "text": [ + "Length of Hello There is: 11\n" + ] } ], "prompt_number": 11 @@ -255,19 +528,35 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.13, Page Number: 142<h3>" + "source": [ + "<h3>Example 7.13, Page Number: 142<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Demonstrates how to access command line arguments.'''\n#This wont work because we cannot provide command line arguments\n\nimport sys\n\ndef main():\n if len(sys.argv)!=2:\n print \"You forgot to type your name.\" #CHECK!!!!\n return\n #Result\n print \"Hello \",sys.argv[1]\n\nmain()", + "input": [ + "\n", + "import sys\n", + "\n", + "def main():\n", + " if len(sys.argv)!=2:\n", + " print \"You forgot to type your name.\" #CHECK!!!!\n", + " return\n", + " #Result\n", + " print \"Hello \",sys.argv[1]\n", + "\n", + "main()" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "You forgot to type your name.\n" + "text": [ + "You forgot to type your name.\n" + ] } ], "prompt_number": 2 @@ -275,19 +564,36 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.14, Page Number: 143<h3>" + "source": [ + "<h3>Example 7.14, Page Number: 143<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''The program prints all command line arguments '''\nimport sys\n\n#Result\nfor t in range(len(sys.argv)):\n i=0\n print sys.argv[t] ", + "input": [ + "'''The program prints all command line arguments '''\n", + "import sys\n", + "\n", + "#Result\n", + "for t in range(len(sys.argv)):\n", + " i=0\n", + " print sys.argv[t] " + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "-c\n-f\nC:\\Users\\Anandi\\.ipython\\profile_default\\security\\kernel-6e851974-75ff-4911-bdf9-e089a03e5741.json\n--KernelApp.parent_appname='ipython-notebook'\n--interrupt=904\n--parent=876\n" + "text": [ + "-c\n", + "-f\n", + "C:\\Users\\Anandi\\.ipython\\profile_default\\security\\kernel-6e851974-75ff-4911-bdf9-e089a03e5741.json\n", + "--KernelApp.parent_appname='ipython-notebook'\n", + "--interrupt=904\n", + "--parent=876\n" + ] } ], "prompt_number": 2 @@ -295,19 +601,36 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.15, Page Number: 144<h3>" + "source": [ + "<h3>Example 7.15, Page Number: 144<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''This program concatenates the two string arguments and displays them'''\n\nimport sys\n\nif len(sys.argv)!=3:\n print \"usage: add num num\" \nelse :\n #Variable Decleration\n a=sys.argv[1]\n b=sys.argv[2]\n #Result\n print a+b\n \n", + "input": [ + "\n", + "import sys\n", + "\n", + "if len(sys.argv)!=3:\n", + " print \"usage: add num num\" \n", + "else :\n", + " #Variable Decleration\n", + " a=sys.argv[1]\n", + " b=sys.argv[2]\n", + " #Result\n", + " print a+b\n", + " \n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "usage: add num num\n" + "text": [ + "usage: add num num\n" + ] } ], "prompt_number": 3 @@ -315,19 +638,34 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.16, Page Number: 145<h3>" + "source": [ + "<h3>Example 7.16, Page Number: 145<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''An example program'''\n\nimport string\n\n#Variable Decleration\ni=string.atoi(\"100\")\nj=string.atoi(\"100000\")\nk=string.atof(\"-0.123\")\n\n#Result\nprint i,\" \",j,\" \",k", + "input": [ + "\n", + "import string\n", + "\n", + "#Variable Decleration\n", + "i=string.atoi(\"100\")\n", + "j=string.atoi(\"100000\")\n", + "k=string.atof(\"-0.123\")\n", + "\n", + "#Result\n", + "print i,\" \",j,\" \",k" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "100 100000 -0.123\n" + "text": [ + "100 100000 -0.123\n" + ] } ], "prompt_number": 13 @@ -335,24 +673,39 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.17, Page Number: 147<h3>" + "source": [ + "<h3>Example 7.17, Page Number: 147<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Example to use the function abs()'''\n\n#Variable Decleration\ni=abs(-10)\n\n#Result\nprint abs(-23)\nabs(100)", + "input": [ + "\n", + "#Variable Decleration\n", + "i=abs(-10)\n", + "\n", + "#Result\n", + "print abs(-23)\n", + "abs(100)" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "23\n" + "text": [ + "23\n" + ] }, { + "metadata": {}, "output_type": "pyout", "prompt_number": 5, - "text": "100" + "text": [ + "100" + ] } ], "prompt_number": 5 @@ -360,19 +713,36 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.18, Page Number: 148<h3>" + "source": [ + "<h3>Example 7.18, Page Number: 148<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to find a substring'''\n\n#Return index of substring or -1 if not found.\ndef find_substr(sub,str):\n l=str.find(sub)\n return l\n\n#Variable decleration;Calling the function\nindex=find_substr(\"three\",\"one two three four\")\n\n#Result\nprint \"Index of three is \",index", + "input": [ + "\n", + "\n", + "#Return index of substring or -1 if not found.\n", + "def find_substr(sub,str):\n", + " l=str.find(sub)\n", + " return l\n", + "\n", + "#Variable decleration;Calling the function\n", + "index=find_substr(\"three\",\"one two three four\")\n", + "\n", + "#Result\n", + "print \"Index of three is \",index" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "Index of three is 8\n" + "text": [ + "Index of three is 8\n" + ] } ], "prompt_number": 6 @@ -380,19 +750,35 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.19, Page Number: 149<h3>" + "source": [ + "<h3>Example 7.19, Page Number: 149<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to print a string vertically downward'''\n\nimport sys\n\ndef print_vertical(str):\n l=len(str)\n for i in range(l):\n print str[i],\n \nprint_vertical(sys.argv[1])\n ", + "input": [ + "\n", + "\n", + "import sys\n", + "\n", + "def print_vertical(str):\n", + " l=len(str)\n", + " for i in range(l):\n", + " print str[i],\n", + " \n", + "print_vertical(sys.argv[1])\n", + " " + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "- f\n" + "text": [ + "- f\n" + ] } ], "prompt_number": 14 @@ -400,19 +786,36 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.20, Page Number: 150<h3>" + "source": [ + "<h3>Example 7.20, Page Number: 150<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Rework find_substr() to return pointer'''\n\n#Return position of substring\ndef find_substr(sub,str):\n return str.find(sub)\n\n#Variable declaration\ns=\"one two three four\"\n\nsubstr = find_substr(\"three\",s)\n\n#Result\nprint \"substring found:\",s[substr:]\n", + "input": [ + "\n", + "#Return position of substring\n", + "def find_substr(sub,str):\n", + " return str.find(sub)\n", + "\n", + "#Variable declaration\n", + "s=\"one two three four\"\n", + "\n", + "substr = find_substr(\"three\",s)\n", + "\n", + "#Result\n", + "print \"substring found:\",s[substr:]\n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "substring found: three four\n" + "text": [ + "substring found: three four\n" + ] } ], "prompt_number": 2 @@ -420,19 +823,48 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.21, Page Number: 154<h3>" + "source": [ + "<h3>Example 7.21, Page Number: 154<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Program to calculate factorial'''\n\n#Recursive version\ndef factr(n):\n if n==1:\n return 1\n answer=factr(n-1)*n\n return answer\n\n#Iterative version\ndef fact(n):\n answer=1\n for t in range(n):\n answer=answer*(t+1)\n return answer\n\n#Using recursion version\nprint \"4 factorial is \",factr(4)\n\n#Using iterative version\nprint \"4 factorial is \",fact(4)\n\n ", + "input": [ + "\n", + "\n", + "#Recursive version\n", + "def factr(n):\n", + " if n==1:\n", + " return 1\n", + " answer=factr(n-1)*n\n", + " return answer\n", + "\n", + "#Iterative version\n", + "def fact(n):\n", + " answer=1\n", + " for t in range(n):\n", + " answer=answer*(t+1)\n", + " return answer\n", + "\n", + "#Using recursion version\n", + "print \"4 factorial is \",factr(4)\n", + "\n", + "#Using iterative version\n", + "print \"4 factorial is \",fact(4)\n", + "\n", + " " + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "4 factorial is 24\n4 factorial is 24\n" + "text": [ + "4 factorial is 24\n", + "4 factorial is 24\n" + ] } ], "prompt_number": 3 @@ -440,19 +872,38 @@ { "cell_type": "markdown", "metadata": {}, - "source": "<h3>Example 7.22, Page Number: 155<h3>" + "source": [ + "<h3>Example 7.22, Page Number: 155<h3>" + ] }, { "cell_type": "code", "collapsed": false, - "input": "'''Print a string backwards using recursion'''\n\n#Reversing a string\ndef reverse(s):\n r = \"\"\n for c in s:\n r=c+r\n print r\n \n#VariabDecleration \nstr=\"this is a test\"\n\n#Calling function\nreverse(str)\n", + "input": [ + "\n", + "\n", + "#Reversing a string\n", + "def reverse(s):\n", + " r = \"\"\n", + " for c in s:\n", + " r=c+r\n", + " print r\n", + " \n", + "#VariabDecleration \n", + "str=\"this is a test\"\n", + "\n", + "#Calling function\n", + "reverse(str)\n" + ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", - "text": "tset a si siht\n" + "text": [ + "tset a si siht\n" + ] } ], "prompt_number": 9 @@ -460,7 +911,7 @@ { "cell_type": "code", "collapsed": false, - "input": "", + "input": [], "language": "python", "metadata": {}, "outputs": [] |