函數需要輸入多個參數時，象sprintf的用法一樣：
void
?WriteLog2(
bool
?bNeedTime,?
const
?
char
?
*
fmt,?
)
{
????
if
?(fpLog?
==
?NULL)????
return
;
????SYSTEMTIME?tm;
????GetLocalTime(
&
tm);
????
if
?(bNeedTime)
????
{
????????fprintf(fpLog,?
"
%02d:%02d:%02d.%03d\t
"
,?tm.wHour,?tm.wMinute,?tm.wSecond,?tm.wMilliseconds);
????}
????va_list?pArg;
????va_start(pArg,?fmt);
????fprintf(fpLog,?fmt,?pArg);
????va_end(pArg);
????fputs(
"
\n
"
,?fpLog);
}
?