tst_testbit.c

Keil Cx51 V7.0单片机高级语言编程与uVision2应用实践

#include <intrins.h>
#include <stdio.h>                  /* for printf */
void tst_testbit (void){
   bit test_flag;
   if (_testbit_ (test_flag))
      printf ("Bit was set\n");
   else
      printf ("Bit was clear\n");
}