《APUE》读书笔记—第六章数据系统文件和信息

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <unistd.h>
 4 #include <time.h>
 5 #include <errno.h>
 6 #include <string.h>
 7 
 8 int main()
 9 {
10     time_t now;
11     struct tm *ptime;
12     char *ptstr;
13     char timebuf[100];
14     memset(timebuf,0,100);
15    //获取时间，秒数
16     now = time(&now);
17     printf("Global time is:\n");
18    //转化为国际时间
19     ptime = gmtime(&now);
20     ptime->tm_year += 1900;
21     ptime->tm_mon += 1;
22     printf("%d-%d-%d %d:%d:%d\n",ptime->tm_year,ptime->tm_mon,ptime->tm_mday,
23            ptime->tm_hour,ptime->tm_min,ptime->tm_sec);
24     printf("Local time is:\n");
25     //转化为本地时间
26     ptime = localtime(&now);
27     ptime->tm_year += 1900;
28     ptime->tm_mon += 1;
29     printf("%d-%d-%d %d:%d:%d\n",ptime->tm_year,ptime->tm_mon,ptime->tm_mday,
30            ptime->tm_hour,ptime->tm_min,ptime->tm_sec);
31     //将tm结构转换为字符串
32     ptstr = asctime(ptime);
33     printf("tm time stirng is: %s",ptstr);
34     //将time_t类型转换为字符串
35     ptstr = ctime(&now);
36     printf("time_t time string is: %s",ptstr);
37     //date 格式化输出时间
38     strftime(timebuf,100,"%YYear %mMonth %dDay %A %X",ptime);
39     printf("time buf is:%s\n",timebuf);
40     return 0;
41 }