File Handling in C++

Files (Streams) ,[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

C++ STREAMS ,[object Object],[object Object],[object Object]

Flow of Data…. PROGRAM DEVICES OR FILES Input Stream >> Output Stream << Data Data istream class ostream class (Insertion operator) (Extraction operator)

The following classes in C++ have access to file input and output functions: ,[object Object],[object Object],[object Object]

The Stream Class Hierarchy ios istream get() getline() read() >> ostream put() write() << fstreambase iostream Ifstream Open() Tellg() Seekg() Ofstream Open() Tellp() Seekp() fstream NOTE : UPWARD ARROWS INDICATE THE BASE CLASS

DIFFERENT FILE OPERATIONS ,[object Object],[object Object],[object Object],[object Object],[object Object]

OPENING A FILE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],(Associating a stream with a file)

File Mode Parameters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The mode can combine two or more modes using bit wise or ( | )

Checking For Successful File Opening ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Closing of File ,[object Object],[object Object]

Types of Files ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

[object Object],[object Object]

: Sequential access . With this type of file access one must read the data in order, much like with a tape, whether the data is really stored on tape or not. Random access (or direct access ). This type of file access lets you jump to any location in the file, then to any other, etc., all in a reasonable amount of time. ,[object Object]

FILE POINTERS ,[object Object],[object Object],[object Object],[object Object]

File pointers….. ,[object Object],[object Object]

Functions associated with file pointers : ,[object Object],[object Object]

seekg() function : ,[object Object],[object Object],Begin File End k bytes ^ File pointer The seekg() function with one argument

seekg() function : ,[object Object],[object Object],[object Object],Begin End ^ Offset from Begin The seekg() function with two argument

seekg() function : With two arguments : Begin End ^ Offset from Begin The seekg() function with two argument ^ ^ Offset from end Offset from current position

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],//clrscr(); getch(); cout <<"reading from created file "; infl.open("try.txt"); out.open("cod.dat"); //********************************** c=infl.get(); do { d=c+1; cout<<c<<d<<''; out.put(d); c= infl.get(); } while (c!=''); out<<''; infl.close(); outfl.close(); getch(); //********************************* }

File Handling in C++

Recommended

Recommended

More Related Content

What's hot

What's hot (20)

Similar to File Handling in C++

Similar to File Handling in C++ (20)

More from Kulachi Hansraj Model School Ashok Vihar

More from Kulachi Hansraj Model School Ashok Vihar (20)

Recently uploaded

Recently uploaded (20)

File Handling in C++