test.c:
#include <math.h>

int main(void){
 return isgreater(2.3, 4.3);
}

dmc -A test.c
 return isgreater(2.3, 4.3);
                         ^
22.c(4) : Error: ')' expected
22.c(6) : Error: need at least one external def
--- errorlevel 1

David