Skip to main content

C File Handling

File I/O

C File Handling

C files I/O functions handles data on secondary storage device, such as a hard disk.

C can handle files as Stream-oriented data (Text) files and System oriented data (Binary) files.
Stream oriented data filesThe data is stored in same manner as it appears on the screen. The I/O operations like buffering, data conversions etc. take place automatically.
System oriented data filesSystem-oriented data files are more closely associated with the OS and data stored in memory without converting into text format.

C File Operations

There are five major operations that can be performed on a file are:
  • Creation of a new file.
  • Opening an existing file.
  • Reading data from a file.
  • Writing data in a file.
  • Closing a file.

Steps for Processing a File

  • Declare a file pointer variable.
  • Open a file using fopen() function.
  • Process the file using suitable function.
  • Close the file using fclose() function.
To handling files in C, file input/output functions available in the stdio library are:
FunctionUses/Purpose
fopenOpens a file.
fcloseCloses a file.
getcReads a character from a file
putcWrites a character to a file
getwRead integer
putwWrite integer
fprintfPrints formatted output to a file
fscanfReads formatted input from a file
fgetsRead string of characters from file
fputsWrite string of characters to file
feofDetects end-of-file marker in a file
    Labels:

    Comments

    Post a Comment

    For Programs Click Here

    Programs

    Popular posts from this blog

    Python Lists

    Python Lists Dealing with data in a structured format is quiet generous, and this is possible if those data are set accordingly in a specific manner. So, Python provides these data structures named ‘lists’ and ‘tuples’ that are used to organize data in  single set. Python has 6 built-in sequences and among them the most famous are “lists and tuples”. The lists are containers that hold a number of other objects in a given order. It usually puts into practice the sequence protocol and allows programmers to add or remove objects from that sequence. Each element of the sequence is assigned a number i.e. he index and the first index is 0 (zero). This versatile data-type of Python is written in a sequence of list separated by commas between expressions. Creating Lists To build a list, just put a number of expressions in square brackets. The syntax is: Syntax: lst1 = [ ] # lst1 is the name of the list lst2 = [ expression1 , …. , expression_N ] Example: #!/usr/bin/python ls...
    Post a Comment
    Read more

    C++ Qualifiers and Storage Classes

    C++ Qualifiers and Storage Classes Qualifiers and storage class are smaller but important programming concept that helps to make the quality of a variable more accurate for using that variable within the program. In this chapter you will learn about how qualifiers are used with variables and what the roles of different storage classes in C++ are. What is a Qualifier? A qualifier is a token added to a variable which adds an extra  quality , such as specifying volatility or constant-ness to a variable. They act like an adjective for a variable. With or without a qualifier, the variable itself still occupies the same amount of memory, and each bit has the same interpretation or contribution to the state/value. Qualifiers just specify something about how it may be accessed or where it is stored. Three qualifiers are there in C++. These are: const : This is used to define that the type is constant. volatile : his is used to define that the type is volatile. mutable:  applies to non...
    Post a Comment
    Read more

    Syllabus

    Syllabus  C Programming Tutorials C Tutorial C Introduction History of C Programming Language C Installation C Program Structure C Input and Output (I/O) C Format Specifiers Declaration & Assignments C Tokens C Identifiers C Keywords C Constants C Operators C Data Types C Variables C Preprocessors C Type Casting C Custom Header File Flow Control C Decision Making C if Statements C if-else Statements C Nested if-else Statements C else-if Statements C goto Statement C switch Statements C Loops C while loops C do while loops C for loops Functions C Functions C Function Arguments C Library Functions C Variable Scope Arrays & Strings C Arrays C Strings Pointers C Pointers C Dynamic Memory Allocation Structure & Union C Structures C Unions File I/O C File Handling C fopen C fclose C getc C putc C getw C putw C fprintf C fscanf C fgets C fputs C feof                                     ...
    3 comments
    Read more