問個time range 問題 int srcDateTime = 20030821220918; //(yyyymmddhhnnss) int destDateTime = 20030903010301; //(yyyymmddhhnnss) BCB 有沒有可以算出 srcDateTime ~ destDateTime 期間經過了?天?小時?分?秒的method

引言: 問個time range 問題 int srcDateTime = 20030821220918; //(yyyymmddhhnnss) int destDateTime = 20030903010301; //(yyyymmddhhnnss) BCB 有沒有可以算出 srcDateTime ~ destDateTime 期間經過了?天?小時?分?秒的method

您好: 在此修正一個錯誤, 在BCB中, 一個int占4byte, 若是unsigned的話, 可表示的最大值為 2^32 = 4294967296, 已經不符你的需求了, 除非改成__int64型別, 不過還是建議你使用String型態, 以下是我的作法, 不知是否符合你的需求?

void ShowPassDateTime(TDateTime src, TDateTime dest);    void __fastcall TForm1::Button1Click(TObject *Sender)
{
    AnsiString srcDateTime = "20030821220918"; //(yyyymmddhhnnss)
    AnsiString destDateTime = "20030903010301"; //(yyyymmddhhnnss)
    AnsiString srcDate = srcDateTime.SubString(1,4)   "/"   srcDateTime.SubString(5,2)   "/"   srcDateTime.SubString(7,2);
    AnsiString srcTime = srcDateTime.SubString(9,2)   ":"   srcDateTime.SubString(11,2)   ":"   srcDateTime.SubString(13,2);
    AnsiString destDate = destDateTime.SubString(1,4)   "/"   destDateTime.SubString(5,2)   "/"   destDateTime.SubString(7,2);
    AnsiString destTime = destDateTime.SubString(9,2)   ":"   destDateTime.SubString(11,2)   ":"   destDateTime.SubString(13,2);
    TDateTime src = StrToDate(srcDate)   StrToTime(srcTime);
    TDateTime dest = StrToDate(destDate)   StrToTime(destTime);
    ShowPassDateTime(src, dest);
}
//---------------------------------------------------------------------------    void ShowPassDateTime(TDateTime src, TDateTime dest)
{
    double passtime = dest - src;
    double fraction;
    int days,hours=0, minutes=0, seconds=0;        if (passtime < 0)
        passtime = -passtime;
    days = (int) passtime;
    fraction = passtime - days;
    if (fraction != 0)
    {
        hours = (int)(fraction * 24);
        fraction = (fraction*24) - hours;
        if (fraction != 0)
        {
            minutes = (int)(fraction * 60);
            fraction = (fraction*60) - minutes;
            if (fraction != 0)
            {
                seconds = (int)(fraction * 60);
                fraction = (fraction*60) - seconds;
            }
        }
    }
    ShowMessage("經過了" IntToStr(days) "天" IntToStr(hours) "小時" IntToStr(minutes) "分" IntToStr(seconds) "秒");
}

在此必須注意的是StrToDate及StrToTime, 最好加個try{} catch(...){} 或者是你的日期時間字串符合

針對這個int的資料溢位，我做個補充，  

Remarks    All data transmitted on the network during a remote procedure call 
must resolve to a base type or predefined type.
MIDL supports the following base types: boolean, byte, char, double, 
float, handle_t, hyper, long, short, small, and 
void *. The keywords signed and unsigned can be used to qualify 
integer and character types. MIDL also provides the predefined types 
error_status_t and wchar_t.    Base types can appear as type specifiers in const declarations, 
typedef declarations, general declarations, and as parameter type 
specifiers in function declarators.
The base and predefined types have the following default signs and 
default sizes:    Base type        Default sign        Description
boolean        unsigned        8-bit data item
byte        - (not applicable)        8-bit data item
char        unsigned        8-bit unsigned data item
double        -        64-bit floating-point number
float        -        32-bit floating-point number
handle_t        -        Primitive handle type
hyper        signed        64-bit signed integer
long        signed        32-bit signed integer
short        signed        16-bit signed integer
small        signed        8-bit signed integer
void *        -        32-bit context handle pointer type
wchar_t        unsigned        16-bit unsigned data item    Any other types in the interface must be derived from these base or 
predefined types. This requirement has the following two important 
effects:    The type int cannot appear in remote functions without a size 
qualifier such as short, small, long or hyper.    The type void * cannot appear in remote functions except when it is 
used to define a context handle.    DCE IDL compilers do not recognize the keyword signed. You can only 
use the keyword unsigned when you use the MIDL compiler in DCE-compatibility mode.     

在bcb中有個hyper可以用，所以當你的int不夠用的時候， 可以換這個64bit試試

     hyper srcDateTime = 20030821220918;
    ShowMessage(IntToStr(srcDateTime));    

國泰平安