C/C++ Pre-processor Commands

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C/C++ Pre-processor Commands

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#, ## manipulate strings
#define define variables
#error display an error message
#if, #ifdef, #ifndef, #else, #elif, #endif conditional operators
#include insert the contents of another file
#line set line and file information
#pragma implementation specific command
#undef used to undefine variables
Predefined preprocessor variables miscellaneous preprocessor variables
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