怎样可以让
str:='21251 6545454 21213211'
返回:'21213211'str:='sadfa sdfdsfdf tryetry gfhgfhg'
返回:'gfhgfhg'str:='wft jwjfk ewrtfw jksjdf asdfasasdf aweffre'
返回:'aweffre'
str:='21251 6545454 21213211'
返回:'21213211'str:='sadfa sdfdsfdf tryetry gfhgfhg'
返回:'gfhgfhg'str:='wft jwjfk ewrtfw jksjdf asdfasasdf aweffre'
返回:'aweffre'
var
str:string;
i:integer;
begin
str:=trim(edit1.Text);
i:=1;
while i>0 do
begin
i:=pos(' ',str);
str:=copy(str,i+1,length(str));
end;
showmessage(str);
end;
或者别的什么函数?