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"metadata": {
"name": "",
"signature": "sha256:8ebda07d5e13c6b4a8132b67344e9246eeb8703f2dcc433e1b4e350db4cace07"
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"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 17: Advanced Uses of Pointers"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example remind2.c, Page 418"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"MAX_REMIND=50\n",
"MSG_LEN=60\n",
"reminders = [['' for i in xrange(MSG_LEN+3)] for i in xrange(MAX_REMIND)]\n",
"num_remind=0\n",
"while(1):\n",
" if(num_remind==MAX_REMIND):\n",
" print \"--No space left --\"\n",
" break\n",
" li=raw_input( \"Enter day and reminder: \")\n",
" li1=li.split()\n",
" day_str=li1[0]\n",
" if(day_str=='0'):\n",
" breakb n\n",
" msg_str=li1[1:]\n",
" i=0\n",
" for i in range(num_remind):\n",
" if(day_str<reminders[i]):\n",
" break\n",
" j=num_remind\n",
" while(j>i):\n",
" reminders[j]=reminders[j-1]\n",
" j=j-1\n",
" reminders[i]=day_str\n",
" reminders[i]=str(reminders[i])+str(msg_str)\n",
" \n",
" num_remind=num_remind+1\n",
"print \"\"\n",
"print \"Day Reminder\"\n",
"for i in range(num_remind):\n",
" print \"%s\"%reminders[i]"
],
"language": "python",
"metadata": {},
"outputs": []
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example inventory2.c, Page 434"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"NAME_LEN=25\n",
"MAX_PARTS=100\n",
"num_parts=0\n",
"number1=[0]*100\n",
"on_hand1=[0]*100\n",
"name1=[0]*100\n",
"def find_part(number):\n",
" i=0\n",
" for i in range (i,num_parts):\n",
" if(number1[i]==number):\n",
" return i\n",
" return -1\n",
"def insert():\n",
" num_parts=0\n",
" if(num_parts==MAX_PARTS):\n",
" print \"Database is full, cant add more parts\"\n",
" return\n",
" part_number=int(raw_input(\"Enter part number: \"))\n",
" if(find_part(part_number)>=0):\n",
" print \"Part already exists\"\n",
" return\n",
" number1[num_parts]=part_number\n",
" name1[num_parts]=raw_input(\"Enter part name: \")\n",
" on_hand1[num_parts]=raw_input(\"Enter quality on hand: \")\n",
" num_parts=num_parts+1\n",
" \n",
"def search():\n",
" number=int(raw_input(\"Enter part number: \"))\n",
" i=find_part(number)\n",
" if(i>=0):\n",
" print \"Part name: %s\" %name1[i]\n",
" print \"Quantity on hand: %d\"%on_hand1[i]\n",
" else:\n",
" print \"Part not found\"\n",
" \n",
"def update():\n",
" number=int(raw_input(\"Enter part number: \"))\n",
" i=find_part(number)\n",
" if(i>=0):\n",
" change=int(raw_input(\"Enter change in quantity on hand: \")) \n",
" on_hand1[i]=on_hand1[i]+change\n",
" else:\n",
" print \"Part not found\"\n",
"\n",
"while(1):\n",
" code=raw_input(\"Enter operation code: \")\n",
" if code=='i':\n",
" insert()\n",
" break\n",
" elif code=='s':\n",
" search()\n",
" break\n",
" elif code=='u':\n",
" update()\n",
" break\n",
" elif(code=='p'):\n",
" print()\n",
" break\n",
"\n",
"print \"\""
],
"language": "python",
"metadata": {},
"outputs": []
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example tabulate.c, Page 444"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"\n",
"initial=float(raw_input(\"Enter initial value: \"))\n",
"final=float(raw_input(\"Enter final value: \"))\n",
"increment=float(raw_input(\"Enter increment: \"))\n",
"print \"\"\n",
"print \" x cos(x)\"\n",
"print \"-------------------------\"\n",
"\n",
"def tabulatec( first, last, incr):\n",
" num_intervals=int(math.ceil((last-first)/incr))\n",
" for i in range(num_intervals):\n",
" x=first+i*incr\n",
" print \"%10.5f %10.5f\"%(x,math.cos(x))\n",
"def tabulates( first, last, incr):\n",
" num_intervals=int(math.ceil((last-first)/incr))\n",
" for i in range(num_intervals):\n",
" x=first+i*incr\n",
" print \"%10.5f %10.5f\"%(x,math.sin(x))\n",
"def tabulatet( first, last, incr):\n",
" num_intervals=int(math.ceil((last-first)/incr))\n",
" for i in range(num_intervals):\n",
" x=first+i*incr\n",
" print \"%10.5f %10.5f\"%(x,math.tan(x))\n",
"\n",
" \n",
"tabulatec(initial,final, increment)\n",
"print \"\"\n",
"print \" x sin(x)\"\n",
"print \"\"\n",
"print \"-------------------------\"\n",
"tabulates(initial,final, increment)\n",
"print \"\"\n",
"print \" x tan(x)\"\n",
"print \"\"\n",
"print \"-------------------------\"\n",
"tabulatet(initial,final, increment)\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter initial value: 0\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter final value: .5\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter increment: .1\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
" x cos(x)\n",
"--------------------------\n",
" 0.00000 1.00000\n",
" 0.10000 0.99500\n",
" 0.20000 0.98007\n",
" 0.30000 0.95534\n",
" 0.40000 0.92106\n",
"\n",
" x sin(x)\n",
"\n",
"-------------------------\n",
" 0.00000 0.00000\n",
" 0.10000 0.09983\n",
" 0.20000 0.19867\n",
" 0.30000 0.29552\n",
" 0.40000 0.38942\n",
"\n",
" x tan(x)\n",
"\n",
"-------------------------\n",
" 0.00000 0.00000\n",
" 0.10000 0.10033\n",
" 0.20000 0.20271\n",
" 0.30000 0.30934\n",
" 0.40000 0.42279\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "code",
"collapsed": false,
"input": [],
"language": "python",
"metadata": {},
"outputs": []
}
],
"metadata": {}
}
]
}