- 例程
int main(int argc, char *argv[])
{
clock_t s_clk,e_clk;
struct tms s_tms,e_tms;
s_clk = times(&s_tms);
system("ls /dev");
system("date");
sleep(1);
e_clk = times(&e_tms);
printf("e_clk %ld - s_clk %ld = %ld\n",e_clk , s_clk,e_clk-s_clk);
// pr_time(1,s_tms,e_tms);
printf("user time e_tms %ld - s_tms %ld = %ld\n",
e_tms.tms_utime,s_tms.tms_stime,(e_tms.tms_utime - s_tms.tms_utime));
printf("system time e_tms %ld - s_tms %ld = %ld\n",
e_tms.tms_stime,s_tms.tms_stime,(e_tms.tms_stime - s_tms.tms_stime));
return 0;
}
./a.out
2016年 04月 03日 星期日 15:40:10 CST
e_clk 1742131978 - s_clk 1742131878 = 100
user time e_tms 0 - s_tms 0 = 0
system time e_tms 0 - s_tms 0 = 0
时间差为什么还是 0.