C Tutorial/Preprocessor/ifelse

ifelse

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

<source lang="cpp">#define USA 1

1. define EUP 1
2. include <stdio.h>

1. if (defined (USA))

       #define currency_rate 46

1. else

       #define currency_rate 100           

1. endif

main() {

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

}</source>

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