Macros in Headers : Header Files « Language « C Tutorial






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To force the compiler to use the real function: undefine the macro name using #undef.

#undef abs








1.17.Header Files
1.17.1.Include header file
1.17.2.Include the header file for input and output
1.17.3.Headers
1.17.4.Common Headers
1.17.5.Headers Added by C99
1.17.6.Macros in Headers