Ans :
After opening the file, the next thing needed is the way to read or write the file. There are several functions and macros defined in header file for reading and writing the file. These functions can be categorized according to the form and type of data read or written on to a file. These functions are classified as:
• Character input/output functions
• String input/output functions
• Formatted input/output functions 61
• Block input/output functions.
