- Mar 25, 2011 ok,lets,here we use Dev C to make header file. 1) Open the Dev c and Create new Console application and save it in new folder. 2) Now,time to the Write a Code. Ok, When you Create new Project than main.cpp file create by default, in this file Write following codes.
- Feb 03, 2018 how to create header file in c language, make a c header file in just few minutes, make your own header file. নিজের পছন্দমত হেডার ফাইল তৈরি.
- It was originally developed as an open-source fork of the Bloodshed Dev-C IDE. Installation and Use Even though DEV-C is filled with advanced compiler, debugger and a wide array of dev tools, it’s installation package is quite small (only around 50 MB) and therefore can be easily installed on any modern Windows PC or laptop.
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File Handling in C++
Headers go between; header files go between '. Pusha t cook it down free download. Headers are provided by the implementation; header files are provided by the programmer. Headers can be a part of the binary compiler, or their information can be known by the compiler without any other support. – pmg Dec 8 '10 at 13:45. Thanks, for explaining. Dec 12, 2018 graphics programming in dev c with examples graphics in dev c rar graphics in dev c free download bgi graphics c graphics.h download for code blocks dev c.
File Handling concept in C++ language is used for store a data permanently in computer. Using file handling we can store our data in Secondary memory (Hard disk).
Why use File Handling in C++
- For permanet storage.
- The transfer of input - data or output - data from one computer to another can be easily done by using files.
For read and write from a file you need another standard C++ library called fstream, which defines three new data types:
Datatype | Description |
---|---|
ofstream | This is used to create a file and write data on files |
ifstream | This is used to read data from files |
fstream | This is used to both read and write data from/to files |
How to achieve File Handling
For achieving file handling in C++ we need follow following steps
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- Naming a file
- Opening a file
- Reading data from file
- Writing data into file
- Closing a file
Functions use in File Handling
Function | Operation |
---|---|
open() | To create a file |
close() | To close an existing file |
get() | Read a single character from a file |
put() | write a single character in file. |
read() | Read data from file |
write() | Write data into file. |
Defining and Opening a File
The function open() can be used to open multiple files that use the same stream object.
Example
Closing a File
A file must be close after completion of all operation related to file. For closing file we need close() function.
File Opening mode
Mode | Meaning | Purpose |
---|---|---|
ios :: out | Write | Open the file for write only. |
ios :: in | read | Open the file for read only. |
ios :: app | Appending | Open the file for appending data to end-of-file. |
ios :: ate | Appending | take us to the end of the file when it is opened. |
Nexus vst download free mac. Both ios :: app and ios :: ate take us to the end of the file when it is opened. The difference between the two parameters is that the ios :: app allows us to add data to the end of file only, while ios :: ate mode permits us to add data or to modify the existing data any where in the file.
The mode can combine two or more parameters using the bitwise OR operator (symbol |)
Example
File pointer
![For For](/uploads/1/2/6/8/126881805/372684920.png)
Each file have two associated pointers known as the file pointers. Lg tv auto tuning help. One of them is called the input pointer (or get pointer) and the other is called the output pointer (or put pointer). The input pointer is used for reading the contents of a given file location and the output pointer is used for writing to a given file location.
Function for manipulation of file pointer
When we want to move file pointer to desired position then use these function for manage the file pointers.
Function | Operation |
---|---|
seekg() | moves get pointer (input) to a specified location. |
seekp() | moves put pointer (output) to a specified location. |
tellg() | gives the current position of the get pointer. |
tellp() | gives the current position of the put pointer. |
fout . seekg(0, ios :: beg) | go to start |
fout . seekg(0, ios :: cur) | stay at current position |
fout . seekg(0, ios :: end) | go to the end of file |
fout . seekg(m, ios :: beg) | move to m+1 byte in the file |
fout . seekg(m, ios :: cur) | go forward by m bytes from the current position |
fout . seekg(-m, ios :: cur) | go backward by m bytes from the current position |
fout . seekg(-m, ios :: end) | go backward by m bytes from the end |
put() and get() function
The function put() write a single character to the associated stream. Similarly, the function get() reads a single character from the associated stream.
read() and write() function
These function take two arguments. The first is the address of the variable V , and the second is the length of that variable in bytes. The address of variable must be cast to type char * (i.e pointer to character type).
Read and Write data from/to File
File handling in C++
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Download ppt file releated to file handling File Handling ppt