Mega Code Archive
#IF #ELSE #ENDIF
//file1.h
#define USD 1
//file2.h
#define UKP 1
//file3
#include
#include
#if (defined (USD))
#define currency_rate 46
#else
#define currency_rate 100
#endif
main() {
int rs;
rs = 10 * currency_rate;
printf ("d\n", rs);
}