{
"metadata": {
"name": "",
"signature": "sha256:13c473411b35212c9727620c7673dc52636d4bf1a83b0d4eeb082d160a75324d"
},
"nbformat": 3,
"nbformat_minor": 0,
"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter 12 : Union"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example: 1, Page No.5.87"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#program using union.\n",
"\n",
"class union_name:\n",
" a=0\n",
" b=[0,1]\n",
" \n",
"c=union_name()\n",
"c.a=256\n",
"\n",
"print \"c.a value is %d\\n \"%c.a\n",
"print \"c.b[0] value is %d\\n\"%c.b[0]\n",
"print \"c.b[1] value is %d\\n\"%c.b[1]\n",
"\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"c.a value is 256\n",
" \n",
"c.b[0] value is 0\n",
"\n",
"c.b[1] value is 1\n",
"\n"
]
}
],
"prompt_number": 1
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example: 2, Page No.:5.87"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#program to find size of union and number of bytes\n",
"\n",
"import sys\n",
"\n",
"class union_result:\n",
" marks=0\n",
" grade=''\n",
" \n",
" \n",
"class struct_res:\n",
" name=[15]\n",
" age=0\n",
" sex=''\n",
" address=''\n",
" pincode=0\n",
" perf=union_result()\n",
" \n",
"data=struct_res() \n",
"\n",
"#Result\n",
"print \"Size of Union: %d\\n\"%sys.getsizeof(data.perf)\n",
"print \"Size of Structure: %d\\n\"%sys.getsizeof(data)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Size of Union: 32\n",
"\n",
"Size of Structure: 32\n",
"\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Pointer to Unions cannot convert as no pointer in python. Page no. 5.88"
],
"language": "python",
"metadata": {},
"outputs": []
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example: 3, Page No.:5.89"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program that includes of initial values to structure variable\n",
"\n",
"import sys\n",
"\n",
"\n",
"class union_id:\n",
" color='20'\n",
" size=0\n",
" \n",
"\n",
"class struct_clothes:\n",
" manufacturer='30'\n",
" cost=0.0\n",
" description=union_id()\n",
" \n",
" \n",
"shirt=struct_clothes()\n",
"shirt.manufacturer='Indian'\n",
"shirt.cost=35.00\n",
"shirt.description.color='Black'\n",
"\n",
"print \"%d\\n\"%(sys.getsizeof(union_id))\n",
"\n",
"print \"%s %f \"%(shirt.manufacturer,shirt.cost),\"%s %d\\n \"%(shirt.description.color, shirt.description.size)\n",
" \n",
"\n",
"shirt.description.size =12\n",
"\n",
"\n",
"print \"%s %f \"%(shirt.manufacturer, shirt.cost),\"%s %d\\n \"%(shirt.description.color, shirt.description.size)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"48\n",
"\n",
"Indian 35.000000 Black 0\n",
" \n",
"Indian 35.000000 Black 12\n",
" \n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example: 4, Page no.: 5.92"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program to read and write employee and their date of joining using nested structure. \n",
"\n",
"\n",
"class date:\n",
" day=0\n",
" month=\"\"\n",
" year=0\n",
" \n",
"class employee:\n",
" code=0\n",
" name=''\n",
" salary=0.0\n",
" doj=date()\n",
" \n",
" \n",
"emp1=employee()\n",
"\n",
"emp1.code=input(\"Enter Employee Code: \")\n",
"emp1.name=raw_input(\"Enter the Employee Name: \")\n",
"emp1.salary=input(\"Enter the Employee Salary: \")\n",
"\n",
"print \"\\nEnter Date of joining in order\\n\"\n",
"emp1.doj.day=input(\"Enter day: \")\n",
"emp1.doj.month=raw_input(\"Enter month: \")\n",
"emp1.doj.year=input(\"Enter year: \")\n",
"\n",
"print \"\\nThe Employee Code is: %d\"%emp1.code\n",
"print \"\\nThe Employee Name is: %s\"%emp1.name\n",
"print \"\\nThe Employee Name is: %f\"%emp1.salary\n",
"print \"\\nThe Employee DOJ is: %d %s %d\"%(emp1.doj.day,emp1.doj.month,emp1.doj.year)\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter Employee Code: 200\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Employee Name: VIJI\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Employee Salary: 2000.00\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"Enter Date of joining in order\n",
"\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter day: 12\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter month: December\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter year: 2004\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"The Employee Code is: 200\n",
"\n",
"The Employee Name is: VIJI\n",
"\n",
"The Employee Name is: 2000.000000\n",
"\n",
"The Employee DOJ is: 12 December 2004\n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example: 5, Page No. 5.93"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program to store 3 records in one structure\n",
"\n",
"\n",
"class book:\n",
" name=''\n",
" price=0\n",
" pages=0\n",
" \n",
" \n",
"b=[book() for a in range(0,3)]\n",
"\n",
"for i in range(0,3):\n",
" b[i].name=raw_input(\"Enter the Book Name: \")\n",
" b[i].price=input(\"Enter the Book Price: \")\n",
" b[i].pages=input(\"Enter the Book Pages: \")\n",
" \n",
"print '\\n' \n",
"for i in range(0,3):\n",
" print \"%s\\t\"%(b[i].name),\"%d\\t\"%(b[i].price),\"%d\\n\"%(b[i].pages)"
],
"language": "python",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Name: English\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Price: 165\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Pages: 200\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Name: Maths\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Price: 300\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Pages: 450\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Name: Physics\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Price: 250\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Book Pages: 370\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"\n",
"English\t165\t200\n",
"\n",
"Maths\t300\t450\n",
"\n",
"Physics\t250\t370\n",
"\n"
]
}
],
"prompt_number": 8
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example: 6, Page No. 5.95"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program to copy of entire structure to a function\n",
"\n",
"class std:\n",
" no=0\n",
" avg=0.0\n",
"\n",
"a=std()\n",
"\n",
"a.no=15\n",
"a.avg=90.75\n",
"\n",
"def func(Struct_p):\n",
" print \"Number is.... %d\\n\"%a.no\n",
" print \"Average is... %f\"%a.avg\n",
" \n",
"func(a)\n",
"\n",
" "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Number is.... 15\n",
"\n",
"Average is... 90.750000\n"
]
}
],
"prompt_number": 9
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Example: 7, Page No.:5.97"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"\n",
"#Programs shows how the structure can be accessed by a pointer variable.\n",
"\n",
"class student:\n",
" roll_no=0\n",
" name=''\n",
" marks=0.0\n",
"stud1=student()\n",
"\n",
"print \"Enter the student details: \\n\"\n",
"stud1.roll_no=input()\n",
"stud1.name=raw_input()\n",
"stud1.marks=input()\n",
"\n",
"print \"\\nDisplay of structure using structure variable\\n\"\n",
"print \"Roll No\\t Name\\t Marks\"\n",
"print \"\\n-------\\t ----- -------\\n\"\n",
"print \"%d\\t %s\\t %f\"%(stud1.roll_no,stud1.name,stud1.marks)\n",
"\n",
"pt=stud1\n",
"\n",
"print \"\\nDisplay of structure using pointer variable\\n\"\n",
"print \"Roll No\\t Name\\t Marks\"\n",
"print \"\\n-------\\t ----- -------\\n\"\n",
"print \"%d\\t %s\\t %f\"%(pt.roll_no,pt.name,pt.marks)\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the student details: \n",
"\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"39\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Muni\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"77\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"Display of structure using structure variable\n",
"\n",
"Roll No\t Name\t Marks\n",
"\n",
"-------\t ----- -------\n",
"\n",
"39\t Muni\t 77.000000\n",
"\n",
"Display of structure using pointer variable\n",
"\n",
"Roll No\t Name\t Marks\n",
"\n",
"-------\t ----- -------\n",
"\n",
"39\t Muni\t 77.000000\n"
]
}
],
"prompt_number": 6
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Case Study: 1, Page No.:5.98"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program to transfer a structure to a function by passing the structure address to the function\n",
"\n",
"class struct:\n",
" name=''\n",
" no=0\n",
" age=0\n",
"record=struct()\n",
"std=record\n",
"std.name,std.no,std.age=[\"LAK\",15,25]\n",
"print \"%s\\t%d\\t%d\"%(std.name,std.no,std.age)\n",
"\n",
"def fun(std):\n",
" pt.name=\"Muni\"\n",
" pt.no=16\n",
" pt.age=26\n",
" \n",
"std.name=pt.name\n",
"std.no=pt.no\n",
"std.age=pt.age\n",
"\n",
"print \"%s\\t%d\\t%d\"%(std.name,std.no,std.age)\n",
" \n",
" "
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"LAK\t15\t25\n",
"Muni\t16\t26\n"
]
}
],
"prompt_number": 24
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Case Study: 2, Page No.:5.100"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program to pass an array of structure to a function, and return a pointer to a structure.\n",
"import sys\n",
"N=3\n",
"NULL=0\n",
"\n",
"class struct:\n",
" sno=0\n",
" name=''\n",
" age=0\n",
" \n",
"record=struct()\n",
"std=record\n",
"\n",
"print \"Student Number Locater\"\n",
"print \"To Exit the program enter '0' for student number\"\n",
"stdno=input(\"Enter the Student Number: \")\n",
"print \"\\n\"\n",
"if stdno ==15:\n",
"\n",
" std.sno,std.name,std.age=[15,\"MUNI\",28]\n",
" print \"Number .... %d \\n\"%(std.sno)\n",
" print \"Name ...... %s\\n\"%(std.name)\n",
" print \"Age ....... %d\\n\"%(std.age)\n",
"if stdno == 16:\n",
" std.sno,std.name,std.age=[16,\"LAK\",27]\n",
" print \"Number .... %d \\n\"%(std.sno)\n",
" print \"Name ...... %s\\n\"%(std.name)\n",
" print \"Age ....... %d\\n\"%(std.age)\n",
" \n",
"if stdno == 17:\n",
" std.sno,std.name,std.age=[17,\"RAJA\",31]\n",
" print \"Number .... %d \\n\"%(std.sno)\n",
" print \"Name ...... %s\\n\"%(std.name)\n",
" print \"Age ....... %d\\n\"%(std.age)\n",
" \n",
"if stdno==0:\n",
" exit\n",
"\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Student Number Locater\n",
"To Exit the program enter '0' for student number\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter the Student Number: 15\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"\n",
"Number .... 15 \n",
"\n",
"Name ...... MUNI\n",
"\n",
"Age ....... 28\n",
"\n"
]
}
],
"prompt_number": 5
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Case Study: 3, Page No.: 5.101"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program to print student name and mark using structure\n",
"\n",
"class student:\n",
" name=''\n",
" marks=0.00\n",
" \n",
"s1=''\n",
"f=0.00\n",
"\n",
"student1=student()\n",
"\n",
"student2=student()\n",
"\n",
"\n",
"student1.name=raw_input(\"Enter Name: \")\n",
"f=input(\"Enter Mark: \")\n",
"\n",
"student2.marks=f\n",
"\n",
"print \"\\nName is %s \\n\"%student1.name\n",
"print \"Marks are %f \\n\"%student2.marks\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter Name: Venkat\n"
]
},
{
"name": "stdout",
"output_type": "stream",
"stream": "stdout",
"text": [
"Enter Mark: 89\n"
]
},
{
"output_type": "stream",
"stream": "stdout",
"text": [
"\n",
"Name is Venkat \n",
"\n",
"Marks are 89.000000 \n",
"\n"
]
}
],
"prompt_number": 10
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Case Study 4, Page No.: 5.102"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"#Program to print marks, grade and their address using union\n",
"\n",
"\n",
"\n",
"class union_marks:\n",
" perc=0.00\n",
" grade=''\n",
" \n",
"student1=union_marks()\n",
"\n",
"student1.perc=98.5\n",
"\n",
"print \"Marks are %f \\t address is %8lu\\n\"%(student1.perc, id(student1.perc))\n",
"\n",
"student1.grade='A'\n",
"\n",
"print \"Grade is %c \\t address is %8lu\\n\"%(student1.grade,id(student1.grade))"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"Marks are 98.500000 \t address is 158368916\n",
"\n",
"Grade is A \t address is 3073485064\n",
"\n"
]
}
],
"prompt_number": 11
}
],
"metadata": {}
}
]
}