C++獲取系統時間

1. //由于使用了windows.h，所以這種方法只能在windows系統下使用，不能在Mac或linux下使用 
   

    #include "iostream"


#include "windows.h"  
#include "string"  
using namespace std;  

int main(){  
    SYSTEMTIME ct;  
    GetLocalTime(&ct);;//如果用GetSystemTime(&ct),則獲取的是格林尼治時間  

    int year = ct.wYear;   
    int month = ct.wMonth;  
    int day = ct.wDay;  
    int hour = ct.wHour;  
    int minute = ct.wMinute;  
    int second = ct.wSecond;  

    cout << year << "/" << month << "/" << day << " "  
        << hour << ":" << minute << ":" << second << endl;  

    //把時間轉換成字符串  
    char tmp[100];  
    sprintf_s(tmp, "%d/%d/%d %d:%d:%d", year, month, day, hour, minute, second);  

    string s = tmp;  
    cout << s << endl;  
    cout << tmp << endl;  

    return 0;  
}  </pre>