C语言,关于time.h,int getSystemTime() { time_t timer; time(&timer); tm* t_tm = localtime(&timer); printf("today is %4d %02d %02d %02d %02d %02d\n",t_tm->tm_year+1900,t_tm->tm_mon+1,t_tm->tm_mday,t_tm->tm_hour,t_tm->tm_min,t_tm->tm_sec); return 0;

C语言,关于time.h,int getSystemTime() { time_t timer; time(&timer); tm* t_tm = localtime(&timer); printf("today is %4d %02d %02d %02d %02d %02d\n",t_tm->tm_year+1900,t_tm->tm_mon+1,t_tm->tm_mday,t_tm->tm_hour,t_tm->tm_min,t_tm->tm_sec); return 0;
C语言,关于time.h,
int getSystemTime()
{
time_t timer;
time(&timer);
tm* t_tm = localtime(&timer);
printf("today is %4d %02d %02d %02d %02d %02d\n",t_tm->tm_year+1900,
t_tm->tm_mon+1,t_tm->tm_mday,t_tm->tm_hour,t_tm->tm_min,t_tm->tm_sec);
return 0;
}
里面这些代码的意思实在是不懂,能不能帮我注释一下!
实在是麻烦大家了!
本人新手!
望见谅!

C语言,关于time.h,int getSystemTime() { time_t timer; time(&timer); tm* t_tm = localtime(&timer); printf("today is %4d %02d %02d %02d %02d %02d\n",t_tm->tm_year+1900,t_tm->tm_mon+1,t_tm->tm_mday,t_tm->tm_hour,t_tm->tm_min,t_tm->tm_sec); return 0;
首先你得了解time是一个结构体：
struct tm{
int tm_sec;//秒；
int tm_min;//分；
int tm_hour;//时；
int tm_mday;//日；
int tm_mom;//月；
int tm_year;//年；
int tm_wday;//星期；
int tm_yday;//一年中的第几天；
int tm_isdst;//是否为夏时制；
};
timer_t timer; time_t 其实就是long int timer.
time(&timer); time函数原型是time_t time(time_t *tp);提取当前的时间（以秒的形式,不懂搜百科）所以这句执行后等于是往timer变量里塞进了数据,是多少多少秒.
tm* t_tm=localtime(&timer);localtime()函数功能是将tp地址单元中的时间转换为日期时间结构的当地时间.就是,你把timer长整型转换为了日期时间结构了.就是类似于把3661秒转化为1（小时）1（分钟）1（秒钟）把这三个’1‘分别赋给了 tm_hour,tm_min和tm_sec;
最后就是打印了.