function SearchSubStr(Substr: string; S: string): Integer;Substr为要搜索的子串,S为源串,搜索到子串后则返回在S中的位置索引;唯一需要注意的地方是Substr和S可能是包含汉字的;
如: Substr := 'a串1'; S := '123字符a串111';
如: Substr := 'a串1'; S := '123字符a串111';
调试欢乐多
function LastPos(SearchStr, Str: string): Integer;
var
i: Integer;
TempStr: string;
begin
Result := Pos(SearchStr, Str);
if Result = 0 then Exit;
if (Length(Str) > 0) and (Length(SearchStr) > 0) then
begin
for i := Length(Str) + Length(SearchStr) - 1 downto Result do
begin
TempStr := Copy(Str, i, Length(Str));
if Pos(SearchStr, TempStr) > 0 then
begin
Result := i;
break;
end;
end;
end;
end; function LastPos(SubStr, S: string): Integer;
var
Found, Len, Pos: integer;
begin
Pos := Length(S);
Len := Length(SubStr);
Found := 0;
while (Pos > 0) and (Found = 0) do
begin
if Copy(S, Pos, Len) = SubStr then
Found := Pos;
Dec(Pos);
end;
LastPos := Found;
end;
// Search for the next occurence of a string from a certain Position
function NextPos(SearchStr, Str: string; Position: Integer): Integer;
begin
Delete(Str, 1, Position - 1);
Result := Pos(SearchStr, upperCase(Str));
if Result = 0 then Exit;
if (Length(Str) > 0) and (Length(SearchStr) > 0) then
Result := Result + Position + 1;
end; // Get the number of characters from a certain Position to the string to be searched
function NextPosRel(SearchStr, Str: string; Position: Integer): Integer;
begin
Delete(Str, 1, Position - 1);
Result := Pos(SearchStr, UpperCase(Str)) - 1;
end; // simple replacement for strings
function ReplaceStr(Str, SearchStr, ReplaceStr: string): string;
begin
while Pos(SearchStr, Str) <> 0 do
begin
Insert(ReplaceStr, Str, Pos(SearchStr, Str));
Delete(Str, Pos(SearchStr, Str), Length(SearchStr));
end;
Result := Str;
end;
function Pos(Substr: string; S: string): Integer;
比如Substr := '我';S :='蔽壹';因为'我'的编码是 ced2,
'蔽壹'是 b1ce d2bc
这样就会查到ced2, 返回错误的结果;
另外怎么强制转?