Isspace iso c standard

See Options Controlling C Dialect. GCC does not support the uncorrected version. An amendment to the standard was published in While in development, drafts of this standard version were referred to as C9X. While in development, drafts of this standard version were referred to as C1X. By default, GCC provides some extensions to the C language that, on rare occasions conflict with the C standard. See Extensions to the C Language Family. Some features that are part of the C99 standard are accepted as extensions in C90 mode, and some features that are part of the C11 standard are accepted as extensions in C90 and C99 modes.

Use of the -std options listed above disables these extensions where they conflict with the C standard version selected. The ISO C standard defines in clause 4 two classes of conforming implementation.

In addition, complex types, added in C99, are not required for freestanding implementations. An OS kernel is an example of a program running in a freestanding environment; a program using the facilities of an operating system is an example of a program running in a hosted environment. GCC aims towards being usable as a conforming freestanding implementation, or as the compiler for a conforming hosted implementation. To build an OS kernel, you may well still need to make your own arrangements for linking and startup.

GCC does not provide the library facilities required only of hosted implementations, nor yet all the facilities required by C99 of freestanding implementations on all platforms. To use the facilities of a hosted environment, you need to find them elsewhere for example, in the GNU C library.

Course Index Explore Programiz. Popular Tutorials Data Types in C. C for Loop. Arrays in C Programming. Pointers in C. Find roots of a quadratic equation.

Print Pyramids and Patterns. Check prime number. Print the Fibonacci series. Reference Materials string. Start Learning C. Explore C Examples. C isspace The isspace function checks whether a character is a white-space character or not.

Function prototype of isspace int isspace int argument ; When a character is passed as an argument, corresponding ASCII value integer of the character is passed instead of that character itself. Share on:.