#include <sys/time.h>
#include <stdio.h>
int GetTime()
{
struct timespec tsp;
clock_gettime(CLOCK_REALTIME, &tsp); //Call clock_gettime to fill tsp
fprintf(stdout, "time=%d.%d\n", tsp.tv_sec, tsp.tv_nsec);
fflush(stdout);
}
我试图编译上述代码但它一直抛出错误:
time.c: In function ‘GetTime’:
time.c:12:4: warning: implicit declaration of function ‘clock_gettime’ [-Wimplicit-function-declaration]
time.c:12:18: error: ‘CLOCK_REALTIME’ undeclared (first use in this function)
time.c:12:18: note: each undeclared identifier is reported only once for each function it appears in
time.c:14:4: warning: format ‘%d’ expects argument of type ‘int’, but argument 3 has type ‘__time_t’ [-Wformat]
time.c:14:4: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘long int’ [-Wformat]
我尝试使用 -lrt 标志和 -std=gnu99 进行编译。没有任何效果。
答案1
#include <sys/time.h>
用。。。来代替#include <time.h>
与 fprintf(stdout, "time=%d.%d\n", tsp.tv_sec, tsp.tv_nsec);
fprintf(stdout, "time=%d.%d\n", (int) tsp.tv_sec, (int) ttsp.tv_nsec);
另一个很好的例子:http://ubuntuforums.org/showthread.php?t=1244004&p=7812845#post7812845