函数说明
1.time():get time in seconds from 1970-01-01 00:00:00 +0000 (UTC). 原型： time_t time(time_t *tloc); 2.localtime():transform date and time to broken-down time or ASCII 原型： **struct tm localtime(const time_t timep); 3.strftime() :format date and time 原型： **size_t strftime(char *s, size_t max, const char format,const struct tm tm);
示例
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<unistd.h>
#define FNAME "/tmp/out"
#define BUFFSIZE 1024
int main()
{
struct tm
*tm
;
FILE
*fp
;
char buf
[BUFFSIZE
];
int count
=0;
time_t stamp
;
fp
=fopen(FNAME
,"a+");
if(fp
==NULL)
{
perror("fopen()");
exit(1);
}
while(fgets(buf
,BUFFSIZE
,fp
)!=NULL)
{
count
++;
}
while(1)
{
time(&stamp
);
tm
=localtime(&stamp
);
fprintf(fp
,"%-4d%d-%d-%d %d:%d:%d\n",++count
,\
tm
->tm_year
+1900,tm
->tm_mon
,tm
->tm_mday
,\
tm
->tm_hour
,tm
->tm_min
,tm
->tm_sec
);
fflush(fp
);
sleep(1);
}
fclose(fp
);
exit(0);
}
