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{
"metadata": {
"name": "Chapter 22"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": "<h1>Chapter 22: The C++ Preprocessor<h1>"
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.1, Page Number: 550<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Implement a function-like macro'''\n\ndef MIN(a,b):\n if a<b:\n return a\n else:\n return b\n\n#Variable declaration\nx=10\ny=20\n\n#Result\nprint \"The minimum is\",MIN(x,y)",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "The minimum is 10\n"
}
],
"prompt_number": 2
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.2, Page Number: 551<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Implement a function-like macro'''\n#Since macros is implemented here using functions,\n#it wont give a wrong answer.\n\ndef EVEN(a):\n if a%2==0:\n return 1\n else:\n return 0\n\nif EVEN(9+1):\n print \"is even\"\nelse:\n print \"is odd\"",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "is even\n"
}
],
"prompt_number": 3
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.3, Page Number: 551<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Implement a function-like macro'''\n\ndef EVEN(a):\n if a%2==0:\n return 1\n else:\n return 0\n\nif EVEN(9+1):\n print \"is even\"\nelse:\n print \"is odd\"",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "is even\n"
}
],
"prompt_number": 4
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.4, Page Number: 553<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Impementing #if'''\n\ndef MAX():\n return 100\n\nif MAX()>10:\n print \"Extra memory required.\"\n ",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Extra memory required.\n"
}
],
"prompt_number": 5
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.5, Page Number: 554<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Impementing #if/#else'''\n\ndef MAX():\n return 6\n\nif MAX()>10:\n print \"Extra memory required.\"\nelse:\n print \"Current memory OK.\"\n ",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Current memory OK.\n"
}
],
"prompt_number": 7
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.6, Page Number: 556<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Implementation of #ifdef and #ifndef'''\n\ndef TOM():\n pass\n\n\ntry:\n TOM()\nexcept NameError:\n print \"Programmer is unknown.\"\nelse:\n print \"Programmer is Tom.\"\n \ntry:\n RALPH()\nexcept NameError:\n print \"RALPH not defined.\"\n ",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "Programmer is Tom.\nRALPH not defined.\n"
}
],
"prompt_number": 8
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.7, Page Number: 558<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Implement __LINE__ '''\n\nimport inspect\n\n#Returns the current line number in our program.\ndef lineno():\n return inspect.currentframe().f_back.f_lineno\n \nprint lineno()+200\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "209\n"
}
],
"prompt_number": 9
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.8, Page Number: 559<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Implemention # operator'''\n\ndef mkstr(s):\n return str(s)\n\n#Result\nprint mkstr('I like C++')\n",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "I like C++\n"
}
],
"prompt_number": 10
},
{
"cell_type": "markdown",
"metadata": {},
"source": "<h3>Example 22.9, Page Number: 560<h3>"
},
{
"cell_type": "code",
"collapsed": false,
"input": "'''Implemention # operator'''\n\ndef concat(a,b):\n return a+b\n#Variable declaration\nxy=10\n\n#Result\nexec(\"print %s\")%concat('x','y')",
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": "10\n"
}
],
"prompt_number": 11
},
{
"cell_type": "code",
"collapsed": false,
"input": "",
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}
|
