ExplanationIn the above program the preprocessor directives activates the only one macro based
on the memory model currently selected on the system. Remaining five macros are undefined. The
ladder of #if. • #else. • #endif checks definition of all the six macros. When it finds the defined
macro it is displayed.
11.14 STANDARD I/O PREDEFINED STREAMS IN stdio. h
The Predefined streams automatically opens when the program is started. The Table 11.8 describes
their macro expansion defined in stdio. h header file.
Table 11.8 Standard I/O Predefined Macros in stdio
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