problem with my time code

It prints same values for in all the loop.
and it doesn't add properly new_time.time and new_time.millitm
meaning,
when I print them separately , their value added together doesnt match up with last_time.
Please help me , where am I going wrong :((

Code:

---

void time()
{
        struct timeb new_time;
        double  last_time,latest_time, interval_time = 0, real_interval_time;

        ftime(&new_time); //init purpose
        last_time =(double)new_time.time+(double)(new_time.millitm * 0.001 );
        printf("last_time=%lf\n",last_time);

        while(1)
        {
                ftime(&new_time);
                latest_time=(double)new_time.time+(double)(new_time.millitm * 0.001);
                printf("latest_time=%lf\t",latest_time);

                real_interval_time = latest_time - last_time;
                printf("rit=%lf\t",real_interval_time);
                interval_time += real_interval_time;
                printf("it=%lf\n",interval_time);
                last_time = latest_time;
        }
       

}

---

It works fine for me. In one loop not enough time passes, so in order for the "it" to change you need like 30 iterations or sth. "rit" is almost always 0 or like 0.01.

In any case this is surely better:

Code:

---

last_time =(double)(1000*new_time.time)+(double)(new_time.millitm * 0.001 );
...
latest_time=(double)(1000*new_time.time)+(double)(new_time.millitm);
printf("it=%lf\n",interval_time / 1000);

---

since you don't lose accuracy by dividing multiplying by 0.001!

So it is always the same for you?

EDIT: Also note that time() already exists in so you might want a different name <sys/time.h>