[dywang@dyw219 zzz]$ vim pointer8.c [dywang@dyw219 zzz]$ cat pointer8.c #include <stdio.h> #include <time.h> void getSeconds(unsigned long *par) { *par = time( NULL ); return; } main () { unsigned long sec; getSeconds( &sec ); printf("Number of seconds: %ld\n", sec ); }
[dywang@dyw219 zzz]$ gcc -o pointer8 pointer8.c
[dywang@dyw219 zzz]$ ./pointer8 Number of seconds: 1563269570
date +%s
一樣可以取得這秒數。
[dywang@dyw219 zzz]$ date +%s 1563269576