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main() Multiple Files Prototypes Preprocessor #define #include foo.h vs foo.c #if Multiple #includes -- #pragma once Assert
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The execution of a C program begins with function named main(). All of the files and libraries for the C program are compiled together to build a single program file. That file must contain exactly one main() function which the operating system uses as the starting point for the program. Main() returns an int which, by convention, is 0 if the program completed successfully and non-zero if the program exited due to some error condition. This is just a convention which makes sense in shell oriented environments such as Unix or DOS. Want To Know more with Video ??? Contact for more learning: webmaster@freehost7com |
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