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                                     ...

                             Other C99 Features C programming is developed and standardized by ANSI and ISO and is popular for its powerful, flexible, and elegant language. Because of its suitability for both systems based as well as application based programming it has become an industry standard, general purpose language today. The standardization committee which is working on C are trying to check each element of the language critically and decided that a change or enhancement is necessary in order to continue its legacy and popularity. So, new features were included with a new version – C99. It is recognized as one of the advanced topics of C. In this chapter, you will learn about the features that are available in C99 standard but not in its previous version. What is C99? The C99, previously known as the C9X, is an informal name for ISO/IEC 9899:1999 of C programming standard. It is the enhanced and newer ve...

                         Other C Error Handling Error handling features are not supported by C programming, which is known as exception handling in C++ or in other OOP (Object Oriented Programming) languages. However, there are few methods and variables available in C’s header file  error.h  that is used to locate errors using return values of the function call. In C, the function return  NULL  or  -1  value in case of any error and there is a global variable  errno  which sets the error code / number. Hence, the return value can be used to check error while programming. By principle, programmer is expected to prevent program from errors that occur in the first place, and test return values from functions. C language provides the following functions to represent errors. These are: perror():  This function returns string pass to it along with the textual representation of cur...

File I/O C feof C feof function is used to determine if the end of the file (stream), specified has been reached or not. Syntax: int feof ( FILE * stream ) C feof function returns true in case end of file is reached, otherwise it’s return false.

File I/O C fgets Syntax: char * fgets ( char * str , int n , FILE * stream ) On success, the function returns the same str parameter C fgets function returns NULL pointer in case of a failure.

File I/O C fputs Syntax: int fputs ( const char * str , FILE * stream ) In this function returns non-negative value, otherwise returns EOF on error.