不能编译代码

Question

#if defined(HAVE_TIMES) 
#include <unistd.h> 
static double cycles_diff(struct tms *a,struct tms *b) 
{ 

     clock_t aa = a->tms_utime + 
        a->tms_stime + 
        a->tms_cutime + 
        a->tms_cstime; 

     clock_t bb = b->tmstms_utime 
      +  b->tms_stime 
      +  b->tms_cutime 
      +  b->tms_cstime; 

     return (aa-bb)/(double)sysconf(_SC_CLK_TCK); 
    } 
} 

这给了错误

STRUC TMS

和

的sysconf的

不完全类型声明没有宣布

Answer 1

According to the manual您需要#include <sys/times.h>