一个产生随机数的程序

VC6.0

 


#include <stdio.h>
#include <sys/timeb.h>
#include <WINSOCK2.H>

int hsRandom(void);
void hsGetTimesOfDay(struct timeval * , void *);

int main(void)
{
    printf("the Random number is %d\n",hsRandom());
    return 0;
}

int hsRandom(void)
{
    timeval tv;
    hsGetTimesOfDay(&tv,NULL);

    long seed = tv.tv_sec + tv.tv_usec;
    srand(seed);

    return rand();
}

void hsGetTimesOfDay(struct timeval *tp, void *tz)
{
    struct _timeb timebuffer;
    _ftime(&timebuffer);
    tp->tv_sec = timebuffer.time;
    tp->tv_usec = timebuffer.millitm*1000;
}