localtime and localtime_s

localtime:

 方法一:

          #include <windows.h>
        int main()
         {

         SYSTEMTIME systm;
        GetLocalTime(&systm);
        cout<<systm.wYear<<"-"<<systm.wMonth<<"-"<<systm.wDay<<" "<<
        systm.wHour<<":"<<systm.wMinute<<":"<<systm.wSecond;
        return 0;
          }
方法二:
           #include <iostream>
           #include <ctime>
            using namespace std;
           int main()
           {
            time_t nowtime;
            struct tm* ptm;
           time(&nowtime);
            ptm = localtime(&nowtime);
            cout<<ptm->tm_year + 1900<<"-"<<ptm->tm_mon + 1<<"-"<<ptm->tm_mday<<" "
            <<ptm->tm_hour<<":"<<ptm->tm_min<<":"<<ptm->tm_sec;
           return 0;
             }



localtime_s的用法:

将上面第二种方法改一下变成:localtime_s(struct tm * _Tm, const time_t * _Time)即可

                time_t nowtime;

        struct tm ptm;
        time(&nowtime);

        localtime_s(&ptm,&nowtime);

然后就可以进行ptm对此时此刻时间的调用了

此时ptm是一一个结构体,我没用指针了。

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