//time.t下的函式.
#include <iostream>
#include <time.h>
#include <windows.h>
#include <vector>
using namespace std;
#pragma warning(disable:4996)

//重要函式.
/*
1.time_t time(0);       //返回的是從1970.1.1凌晨0點到當前時間的秒數.
2.tm* localtime(time_t*);   //把秒數轉化為具體的時間.tm是一個結構體.具體成員可以右鍵，然後轉到定義~
3.double difftime(time_t t1, time_t t2);    //比較兩個time_t物件的差異.也就是相差的秒數.
 

4.char* ctime(const time_t*);   //把time_t物件轉化為一段字串.
5.time_t mktime(struct tm* );   //把一個具體時間轉化為一個秒數.
6.clock_t clock();              //相當於一個時鐘,兩個clock_t物件的差值，代表間隔的時間，單位是毫秒，更精確了.

*/

int main()
{
    //第一個例子:
    time_t s = time(0);     //time(0)返回的是從1970.1.1凌晨0點到當前時間的秒數，它是一個一直在變化的值.
    cout << s << endl;

    //第二個例子:
 

    /*tm *temp = localtime(&s);
    int hour = temp->tm_hour;   //幾點.
    int minute = temp->tm_min;  //幾分.
    int month = temp->tm_mon;   //幾月
    int week = temp->tm_wday;   //周幾.0代表週日.
    int year = temp->tm_year + 1900;    //幾年.
    int second = temp->tm_sec;  //幾秒.
    int day = temp->tm_mday;    //幾天.
 


    cout << year << "/" << month << "/" << day << "/" << hour << ":" << minute << ":" << second << " " << "星期" << week << endl;
    cout << __DATE__ << " " <<  __TIME__ << endl;       //當然關於時間，也可以用C語言的巨集來體現.同樣非常的快.*/

    //第三個例子:
    /*time_t s = time(0);
    //間隔3000毫秒.
    Sleep(3000);
    time_t temp = time(0);
    cout << difftime(temp, s) << endl;*/

    //第四個例子:
    /*time_t s = time(0);
    //把秒數轉換為字串.
    char *q = ctime(&s);
    cout << q << endl;*/

    //第五個例子:
    /*clock_t temp = clock();

    vector<int> w;
    for (int i = 0; i < 1000000; ++i)
    {
        w.push_back(i);
    }
    clock_t s = clock();
    //兩個時鐘之差為間隔的時間.單位是毫秒!!!
    cout << s - temp << endl;*/

    system("pause");
    return 0;
}