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C++ programming language part- 70 More abuot Integer Input and Output

November 06, 2017 bappi ashraf

More abuot Integer Input and Output

In the program 47_3, write() function has used. Here, &p is the address of the variable. The (char*) is a type cast. The type cast is required because the first parameter to both read() and write() function is a character pointer. So the address of the object has to be type cast to a character pointer. The process is int a; char b[5]; b=(char*) &a; the other is int=a,b; b=sizeof(a);

Think about the following program

Program 47_9

//inherit.demo

#include

class customer //class defined

{

char cname[21];

int no_people;

char ccat;

float fcost;

char cstart_date[9];

public:

void data_in()

{

cout<<"Type name \t";

cin>>cname;

cout<<" Type number of people \t";

cin>>no_people;

cout<<"Type catagory(N/S) \t"; // Normal or Special

cin>>ccat;

cout<<"Type the cost \t";

cin>>fcost;

cout<<"Type start date \t";

cin>>cstart_date;

}

void data_out()

{

cout<<"name is= "<

cout<<"No of people are = "<

cout<<"catagory is = "<

cout<<"cost is = "<

cout<<"start date is = "<

}

};

class custfile

{

customer c1;

public:

void data_in()

{

char creply;

fstream fil("custfile.dat",ios::out); //ios::app

{

c1.data_in();

fil.write((char*)&c1,sizeof(c1)); //The (char*) is a type cast, The &c1 is address

cout<<"wish to continue ";

cin>>creply;

}

while (creply=='y');

}

void data_out()

{

char creply;

fstream fil("custfile.dat",ios::in); //ios::app

fil.read((char*)&c1,sizeof(c1));

while (fil)

{

c1.data_out();

fil.read((char*)&c1,sizeof(c1));

}

};

void main()

{

custfile cf1;

cf1.data_in();

cf1.data_out();

}

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