#include <sys/types.h>
#include <stdio.h>

#define FLAG 0x00000200

class FlagTest {
public:
    int16_t mFlags;

    FlagTest (void) {
	mFlags = 0;
    }

    void SetFlag (u_int32_t flag, bool value) {
	if (value)
            mFlags |= flag;
	else
            mFlags &= ~flag;
    }

    bool GetFlag (u_int32_t flag) {
	return (mFlags & flag);
    }
};

int main (void)
{
    FlagTest test;

    printf ("initial state %d\n", test.GetFlag(FLAG));
    test.SetFlag (FLAG, 1);
    printf ("set state %d\n", test.GetFlag(FLAG));
}

[msw@pitr msw]$ gcc -O -o testcase testcase.cpp
You have mail in /home/devel/msw/
[msw@pitr msw]$ ./testcase
initial state 0
set state 0
[msw@pitr msw]$ gcc -o testcase testcase.cpp
[msw@pitr msw]$ ./testcase
initial state 0
set state 1