[英]ctime and time warnings compiling on OSX
I am getting some warnings when compiling a C program on OSX 10.6.5, which seem to be quite critical. 在OSX 10.6.5上编译C程序时,我收到一些警告,这似乎很关键。
extras.c:15: warning: implicit declaration of function ‘time’
extras.c: In function ‘outlog’:
extras.c:363: warning: implicit declaration of function ‘ctime’
The corresponding lines are as follows: 相应的行如下:
Lines 13-15: 第13-15行:
RANDNUMGEN = gsl_rng_alloc(gsl_rng_taus);
long t1;
(void) time(&t1);
Lines 360-363: 360-363行:
if (LOG==NULL) { LOG=stdout;}
TVAL = time(NULL);
char* TIMESTRING = ctime(&TVAL);
I believe the program was originally written for Linux, so I wonder if there is a difference between time
and ctime
on the two platforms? 我相信该程序最初是为Linux编写的,所以我想知道两个平台上的time
和ctime
之间是否有区别?
Verify that the C files contains: 验证C文件包含:
#include <time.h>
somewhere around the top. 顶部附近的某个地方。
Also, 也,
long t1;
time(t1);
is pretty lousy code, the argument to time()
has type time_t*
, so that should read 是很糟糕的代码, time()
的参数类型为time_t*
,因此应读取
time_t t1;
time(&t1);
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