Macro in different file : Macro Basic « Macro Preprocessor « C / ANSI-C

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C / ANSI-C » Macro Preprocessor » Macro Basic Screenshots  Macro in different file //file1.h #define USD 1 //file2.h #define UKP 1 //file3 #include <stdio.h> #include <file1.h>  #ifdef USD         #define currency_rate 46  #endif  #ifdef UKP     #define currency_rate 100  #endif  main() {       int rs;   rs = 10 * currency_rate;    printf ("%d\n", rs); }                     Related examples in the same category 1.  Use macro in calculation 2.  Check if a macro has been defined

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