计算从1970年到现在累计的秒数-白红宇

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：

                            
/*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;
}
         
       