我正在尝试打印timeval类型的值。实际上,我可以打印它,但是收到以下警告:
这行有多个标记
该程序进行编译并输出值,但是我想知道我是否做错了什么。谢谢。
printf("%ld.%6ld\n",usage.ru_stime);
printf("%ld.%6ld\n",usage.ru_utime);
使用类型
typedef struct{
struct timeval ru_utime; /* user time used */
struct timeval ru_stime; /* system time used */
long ru_maxrss; /* maximum resident set size */
long ru_ixrss; /* integral shared memory size */
long ru_idrss; /* integral unshared data size */
long ru_isrss; /* integral unshared stack size */
long ru_minflt; /* page reclaims */
long ru_majflt; /* page faults */
long ru_nswap; /* swaps */
long ru_inblock; /* block input operations */
long ru_oublock; /* block output operations */
long ru_msgsnd; /* messages sent */
long ru_msgrcv; /* messages received */
long ru_nsignals; /* signals received */
long ru_nvcsw; /* voluntary context switches */
long ru_nivcsw; /* involuntary context switches */
}rusage;
struct rusage usage;
最佳答案
In the GNU C Library,struct timeval
:
所以你需要做
printf("%ld.%06ld\n", usage.ru_stime.tv_sec, usage.ru_stime.tv_usec);
以获得类似于
1.000123
的“格式正确”的时间戳。