C语言中time函数的用法

 1 struct  tm {
 2     int tm_sec;
 3     int tm_min;
 4     int tm_hour;
 5     int tm_mday;
 6     int tm_mon;
 7     int tm_year;
 8     int tm_wday;
 9     int tm_yday;
10     int tm_isdst;
11 };

 1 #include <time.h>
 2 #include <stdio.h>
 3 #include <dos.h>
 4 int main() {
 5     time_t timer;
 6     struct tm *tblock;
 7     timer=time(NULL);
 8     tblock=localtime(&timer);
 9     printf("Local time is: %s",asctime(tblock));
10     return 0;
11 }

 1 #include <stdio.h>
 2 #include <string.h>
 3 #include <time.h>
 4 int main() {
 5     struct tm t;
 6     char str[80];
 7     t.tm_sec=1;
 8     t.tm_min=3;
 9     t.tm_hour=7;
10     t.tm_mday=22;
11     t.tm_mon=11;
12     t.tm_year=56;
13     t.tm_wday=4;
14     t.tm_yday=0;
15     t.tm_isdst=0;
16     strcpy(str,asctime(&t));
17     printf("%s",str);
18     return 0;
19 }

1 #include <stdio.h>
2 #include <time.h>
3 int main() {
4     time_t t;
5     time(&t);
6     printf("Today‘s date and time: %s",ctime(&t));
7     return 0;
8 }

 1 #include <time.h>
 2 #include <stdio.h>
 3 #include <dos.h>
 4 #include <conio.h>
 5 int main() {
 6     time_t first, second;
 7     clrscr();
 8     first=time(NULL);
 9     delay(2000);
10     second=time(NULL);
11     printf("The difference is: %f seconds",difftime(second,first));
12     getch();
13     return 0;
14 }

 1 #include <stdio.h>
 2 #include <stdlib.h>
 3 #include <time.h>
 4 #include <dos.h>
 5 char *tzstr="TZ=PST8PDT";
 6 int main() {
 7     time_t t;
 8     struct tm *gmt, *area;
 9     putenv(tzstr);
10     tzset();
11     t=time(NULL);
12     area=localtime(&t);
13     printf("Local time is:%s", asctime(area));
14     gmt=gmtime(&t);
15     printf("GMT is:%s", asctime(gmt));
16     return 0;
17 }

1 #include <time.h>
2 #include <stdio.h>
3 #include <dos.h>
4 int main() {
5     time_t t;
6     t=time();
7     printf("The number of seconds since January 1,1970 is %ld",t);
8     return 0;
9 }

 1 #include <time.h> 
 2 #include <stdlib.h> 
 3 #include <stdio.h> 
 4 int main() {
 5      time_t td;
 6      putenv("TZ=PST8PDT");
 7      tzset();
 8      time(&td);
 9      printf("Current time=%s",asctime(localtime(&td)));
10      return 0; 
11 }