fakul

synopsis: INT fakul(OP a,b)

description:

b becomes a!. a is an INTEGER object. a must be >= 0. a and b may be equal. b is freed first.

bugs:

LONGINT should be possible for a.

return:

OK or ERROR

example:

 #include "def.h"
 #include "macro.h"

 main()
 {
 OP b,h2;
 anfang();
 b=callocobject(); h2=callocobject();
 scan(INTEGER,h2); fakul(h2,b); println(b);
 freeall(b); freeall(h2);
 ende();
 }

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