取系统当前时间，有没有精确到毫秒的函数？该怎么解决

取系统当前时间，有没有精确到毫秒的函数？
RT


------解决方案--------------------
#include <time.h>

clock_t start=clock();

//...

clock_t end=clock();

unsigned int dis_time=end-start;
------解决方案--------------------
#include <windows.h>
LARGE_INTEGER LargeInt;
QueryPerformanceFrequency(&LargeInt);
double Frequency = (double)LargeInt.QuadPart;

LONGLONG Start,End;
QueryPerformanceCounter((LARGE_INTEGER *)&Start);
//...
QueryPerformanceCounter((LARGE_INTEGER *)&End);

double Time = (End - Start)/Frequency;
------解决方案--------------------
#include "windows.h "
int main()
{
SYSTEMTIME lTime;
GetLocalTime(&lTime);

return 0;

}

------解决方案--------------------
struct timeval usex;

gettimeofday(&usex,NULL);