ifelse : ifelse « Preprocessor « C Tutorial

1. C Tutorial
2. Preprocessor
3. ifelse

Use ifelse to define an action if the condition is not true.

#define USA 1
#define EUP 1

#include <stdio.h>
            

#if (defined (USA))
        #define currency_rate 46
#else
        #define currency_rate 100           
#endif                         

main()
{
    int rs;
    rs = 10 * currency_rate;   
    printf ("%d\n", rs);
}

460