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C++ programming language part- 64 File Input and Output with abstract data types

November 06, 2017 bappi ashraf

File Input and Output with abstract data types

The following programs deal with file input and output using user-define classes. A class called bill is being used for this purpose.

Writing Objects

Program 46_5

//file input/output

#include

class bill

{ public:

int bill_no;

float bill_amt;

};

void main()

{ ofstream bfil_1("bilfile.txt"); //object would be any name

bill obj1;

obj1.bill_no=1;

obj1.bill_amt=125.56;

bfil_1<

Reading Object

Program 46_6

//file input/output

#include

class bill

{ public:

int bill_no;

float bill_amt;

char bill_str[30];

};

void main()

{ ifstream bfil_2("bilfile.txt");

bill obj2;

bfil_2>>obj2.bill_no>>obj2.bill_amt>>obj2.bill_str;

cout<<"number= "<

cout<<"amount= "<

cout<<" Name= "<

Writing and Reading object together

Program 46_7

{ ofstream bfil_1("bilfile2.txt"); //object would be any name

bill obj1;

obj1.bill_no=1;

obj1.bill_amt=125.56;

bfil_1<

ifstream bfil_2("bilfile2.txt");

bill obj2;

bfil_2>>obj2.bill_no>>obj2.bill_amt;

cout<<"number= "<

cout<<"amount= "<

cout<<"Name = "<

part: 01 Programming Language

part: 02 Compiler

part: 03 Programming Logic

part: 04 Data Type

part: 05 Programming in C++

part: 06 Data Type

part: 07 Get Input from keyboard

part: 08 Operators

part: 09 Arithmetic AssignmentOperators

part: 10 Identifies of Characters

part: 11 do.. while loop

part: 12 unary operators( Incrementand decrement)

part: 13 Decrement

part: 14 for loop

part: 16 Conditional/ternary Operator

part: 17 Break

part: 18 The continue statementforces the next iteration of the loop to take place.

part: 19 Arrays

part: 20 Array Address

part: 21 Arrays and Pointer

part: 22 Two dimensional array

part: 23 Function

part: 24 Function Argument

part: 25 Calling Function

part: 26 Return Values

part: 27 Over Loading Function

part: 29 More about function andothers

part: 30 Passing arrays to function

part: 31 Dynamic memory allocation

part: 32 Library function

part: 33 User define mathematicalfunction (square)

part: 34 I/O Function

part: 35 Boolean Functions

part: 36 Look here's two differentuser define Boolean Functions

part: 37 Function Scope

part: 38 String

part: 39 String I/O

part: 40 Some dafault member function

part: 41 Standard String-Handlingfunction

part: 42 String Array

part: 43 User defined data type

part: 45 Data Storage Type

part: 46 Sratic storage type

part: 47 Extern storage type

part: 48 Classes and Objects

part: 49 Scope Resolution Operator

part: 50 Constructor

part: 51 Destructor

part: 52 Inheritance

part: 53 Overriding Base ClassMembers

part: 54 Scope Resolution with OverriddenMembers

part: 55 Base Class Initialization

part: 56 Multiple Inheritance

part: 57 Protected base ClassInheritance

part- 58 Ambiguity of MultipleClasses

part- 59 Virtual Base Class

part- 60 More about Constructor andDestructor

part- 61 Virtual Function andpolymorphism

part- 62 Virtual function withdynamic polymorphism

part- 63 Streams

part- 64 File Input and Output withabstract data types

part- 65 Writing and Readingcharacter using binary functions

part- 66 The get() function

part- 67 String Input

part- 68 Integer Input and Output

part- 69 File Pointers

part- 70 More abuot Integer Input and Output

part- 71 Exercise:

part- 72 Operator overloading

part- 73 Look here is a program witha class and overload the ==,>,< and += operators

part- 74 Linked List

part- 75 Representing a Node

part- 76 Inserting and Traversing a Node

part- 77 Deleting a Node

part- 78 More about Linked List

part- 79 Programming Logic andTechnique

part- 81 Programming Logic and Technique:

part- 82 Programming Logic andTechnique:

part- 83 Programming Logic andTechnique:

part- 84 Programming Logic andTechnique:

part- 85 Programming Logic and Technique:

Part- 86 assign the content of twostring