delphiÊéд¸ñÔò? - Delphi / ·Ç¼¼ÊõÇø
ÔÚÍøÉÏ¿´µ½ºÜ¶àÈËд³ÌÐò´úÂë,дµÄ´úÂëÿһÐж¼ÊÇҪô¾Í¿ÕÒ»¸ö¿Õ¸ñ,Ҫô¾Í¿ÕºÃ¼¸¸ö,Õâ¸öÓй涨Âð?Ôõô¿´?
ÒÔÏÂÊÇÎÒÔÚÍøÉÏÕÒµÄÒ»¶Î³ÌÐò´úÂë
===============================================================================
procedure CHOBSB(A:MATRX2; N:integer; D:array of real;var B:array of real);
var
I,J:integer; SUM:real;
begin
For I:=1 To N do
begin
Sum:=B[I];
For J:=1 To I - 1 do
Sum:=Sum - A[I, J] * B[J];
B[I]:=Sum;
end;
For I:=N DownTo 1 do
begin
If D[I] = 0 Then
begin
ShowMessage('Singular Matrix');
Exit;
end
Else
Sum:=B[I] / D[I];
For J:=I + 1 To N do
Sum:=Sum - A[J, I] * B[J];
B[I]:=Sum;
end;
end;
Ϊʲô²»ÄÜд³ÉÕâÑù?
===============================================================================
procedure CHOBSB(A:MATRX2; N:integer; D:array of real;var B:array of real);
var
I,J:integer; SUM:real;
begin
For I:=1 To N do
begin
Sum:=B[I];
For J:=1 To I - 1 do
Sum:=Sum - A[I, J] * B[J];
B[I]:=Sum;
end;
For I:=N DownTo 1 do
begin
If D[I] = 0 Then
begin
Ïà¹ØÎÊ´ð£º
Ò»Ö±ÏëʹÓÃdll£¬µ«delphiµÄdll×Ó´°Ìå¾³£Óи÷ÖÖÎÊÌ⣬±ÈÈçÖ÷´°¿ÚÓëdll×Ó´°¿ÚµÄ½¹µãÎÊÌ⣬×Ó´°¿ÚÖпؼþµÄtab¼ü¡¢Èȼü¡¢enter¼üµÈµÄÎÊÌ⣬×Ó´°¿ÚÍ˳öµÄÎÊÌâ¡¢Æ½Ãæ°´Å¥ÎÊÌâµÈµÈ£¬ÍøÕ¾ÉϽøÐÐÁËËÑË÷£¬Ã»ÓбȽÏÍêÃÀµÄ½â¾ö· ......
select * from shuju.DB where ¿ªÅ̼Û-ÊÕÅ̼Û<=0.02
¿ªÅÌ¼Û ÓëÊÕÅÌ¼Û ÊÇÊý¾Ý¿âÀïµÄ×Ö¶Î
select * from aTableName where ((¿ªÅ̼Û-ÊÕÅ̼Û) <=0.02 )
¿ªÅ̼۱ÈÊÕÅ̼۵ÍÁ½·ÖÒÔϵÄÇé¿ö
Mark!!!!!!
se ......
¶¨Òå±äÁ¿s,sqlΪstringÀàÐÍ£¬sΪº¯Êý²ÎÊý£¬sql£º='select field1 from table1 where'+s;ÔËÐÐʱs¸³ÖµÎªid>7»òÕßid<7¡¢id=7,µ«ÊÇÔËÐÐʱ×ÜÊdzö´í£¬Çë¸÷λ°ïÎÒ¸Ä´í£¬¶àл£¡
showMessage(sql)Ï¿´¿´
sql£º='sel ......
ÎÒÓõÄÊÇsql server2000£¬ÀïÃæ´æÓÐ×ֶΣºÕÕÆ¬ image
ÎÒ²»Ã÷°×Ôõô°ÑͼƬ´æÈëÊý¾Ý¿âÖУ¿
ÎÒ»¹ÔÚDelphiÖн¨Á¢ÁË´°Ì壬ÈçºÎ½«Êý¾Ý¿âÖеÄͼƬһ²¢ÏÔʾ³öÀ´£¬ÎÒÓõÄÊÇDBGridºÍImage
ÈçºÎ½«Á½Õß¹ØÁªÆðÀ´£¿£¡
²Î¿¼(ÎÒ»Ø ......