#include <iostream> /*包含time头文件*/#include <time.h>  using namespace std; int main(){    //time_t是long类型，精确到秒，是当前时间和1970年1月1日零点时间的差    const time_t t = time(NULL);     cout<<"current time is "<<t<<endl;     /*本地时间：日期，时间 年月日，星期，时分秒*/    struct tm* current_time = localtime(&t);    printf("current year is %d;current month is %d;current date of month is %d\r\n",        1900 + current_time->tm_year,        1 + current_time->tm_mon/*此month的范围为0-11*/,        current_time->tm_mday);     printf("current day of year is %d;current day in week is %d\r\n",        current_time->tm_yday,/*当前日期是今年的第多少天[0,365] */        current_time->tm_wday/*days since Sunday - [0,6] */);     printf("time part %d:%d:%d \r\n",        current_time->tm_hour,        current_time->tm_min,        current_time->tm_sec);     printf("\t本地时间：%d-%d-%d %d:%d:%d\r\n",        current_time->tm_year + 1900,        current_time->tm_mon + 1,        current_time->tm_mday,        current_time->tm_hour,        current_time->tm_min,        current_time->tm_sec);     /*格林威治时间*/    struct tm* current_gmtime = gmtime(&t);     printf("格林威治时间：%d-%d-%d %d:%d:%d\r\n",        current_gmtime->tm_year + 1900,        current_gmtime->tm_mon + 1,        current_gmtime->tm_mday,        current_gmtime->tm_hour,        current_gmtime->tm_min,        current_gmtime->tm_sec);      system("pause");    return 0;}