File handling in c++
- 2. A file is collection of related data storage in particular area on disk. Output file stream Read data Disk Files C++ Program input file stream Data output Write data Data input
- 3. Stream: Sequence of bits Input streams: Stream that supplies data to a program. Output stream : Stream that receive data from the program File stream: Input file and output file collectively known as file stream IO stream:This stream used for both read and write the data
- 5. Open Close Read Write End of file Delete Update
- 6. ios::app -> Append to end to file ios ::ate -> Go to end of file on opening ios ::binary ->Binary file ios ::in -> Open file for reading only ios :: nocreate ->Open fails if the file does not exist ios ::noreplace-> Open fails if the file already exist ios ::out -> Open file for writing only ios :: trunc ->Delete the contents of file if it exist
- 7. Input pointer (get pointer): Used when reading the contents of file at the given location. Output Pointer: Used when writing the content into the given location.
- 8. seekg() : Moves the get pointer to a specified location. Syntax : seekg(location); seekp():Moves the put pointer to a specified location. Syntax : seekp(location); tellg(): By using this function we can know the current location of the get pointer. Int curloc=ob.tellg(); tellp(): By using this function we can know the current location of the put pointer. Int curloc=ob.tellp();
- 9. Put() :Writes single character to the associated stream Get() : Reads single character to the associated stream Read() :To read a data in binary format Write() :To write a data in binary format
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