计算从1970年到现在累计的秒数

没啥技术含量，只不过是在没事干，就把这个也记上，Windows下好像有这个api函数，但是在wince下用不了，所以还得自己封装一个。大体代码如下：

 

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/*the seconds of round year = 3600*24*366 */ #define SECONDOFROUNDYEAR 31622400   /*the seconds of general year = 3600*24*365 */ #define SECONDOFYEAR 31536000   unsigned int SecondsFrom1970() {     SYSTEMTIME st;     unsigned int tTemp=0;     unsigned int tSecond=0;     int month_s[2][12]={{31,28,31,30,31,30,31,31,30,31,30,31},     {31,29,31,30,31,30,31,31,30,31,30,31}};     int nDays=0;     int nCount=0;     int i;     int j;       GetLocalTime(&st);     tSecond=st.wHour*3600+st.wMinute*60+st.wSecond;       for (i=1970;i<st.wYear;++i)     {         if (IsRound(i))             ++nCount;     }       tTemp+=(st.wYear-1970-nCount)*SECONDOFYEAR+nCount*SECONDOFROUNDYEAR;       if (st.wMonth>1)     {         if (IsRound(st.wYear))         {             for (j=0;j<st.wMonth-1;++j)             {                 tTemp+=month_s[1][j]*MAXSECONDOFDAY;             }             tTemp+=(st.wDay-1)*MAXSECONDOFDAY+tSecond;         }         else         {             for (j=0;j<st.wMonth-1;++j)             {                 tTemp+=month_s[0][j]*MAXSECONDOFDAY;             }             tTemp+=(st.wDay-1)*MAXSECONDOFDAY+tSecond;         }     }     else     {         tTemp+=(st.wDay-1)*MAXSECONDOFDAY+tSecond;     }       return tTemp; }   bool IsRound(int year) {     /*is round year?*/     if((year%100)&&(year%4==0)) return 1;     if((year%100==0)&&(year%400==0)) return 1;     return 0; }