[C/C++基礎]-純C下WINDOWS_LINUX計算時間差

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#include <stdio.h>
#include <sys/timeb.h>
#include <stdlib.h>
#ifdefined(WIN32)
#define  TIMEB    _timeb
#define  ftime    _ftime
typedef __int64 TIME_T;
#else
#define TIMEB timeb
typedef long long TIME_T;
#endif
int time_interval()
{
struct TIMEB ts1,ts2;
TIME_T t1,t2;
int ti;
ftime(&ts1);//开始计时
//do some work
{
int i;
for(i=0;i<100000;i++)
{
int *p=malloc(10000);
int *q=malloc(10000);
int *s=malloc(10000);
int *t=malloc(10000);
free(p);
free(q);
free(s);
free(t);
}
}
ftime(&ts2);//停止计时
t1=(TIME_T)ts1.time*1000+ts1.millitm;
printf("t1=%lld\n",t1);
t2=(TIME_T)ts2.time*1000+ts2.millitm;
printf("t2=%lld\n",t2);
ti=t2-t1;//获取时间间隔，ms为单位的
return ti;
}
int main()
{
int ti=time_interval();
printf("time interval=%d\n",ti);
}