Title: Simple functions for work with words
Question: How work with words in string ?
Answer:
In this article means, what separator - symbols #01..#20.
This is another version of "Word Count" article by Chris Allsop
// get word number N from string S:
function word(s: string; n: integer): string;
var p:pchar;
rv: string;
f: boolean;
begin
p:=pchar(s); f:=false;
while (p^ char(0)) do begin
if p^ ' ' then begin
f:=true;
rv:=rv+p^;
end
else if f then begin
if n = 0 then break;
dec(n);
f:=false;
rv:='';
end;
inc(p);
end;
word:=rv;
end;
// count all words in string S:
function words(s: string): integer;
var p: pchar;
f: boolean;
n: integer;
begin
p:=pchar(s); f:=false; n:=0;
while (p^ char(0)) do begin
if p^ ' ' then begin
if not f then inc(n);
f:=true;
end
else if f then f:=false;
inc(p);
end;
words:=n;
end;
// get position of N'th word in string S
function wordpos(s: string; n:integer):integer;
var p: pchar;
f: boolean;
c: integer;
rv: interger;
begin
p:=pchar(s); f:=false; c:=0;
while (p^ char(0)) do begin
if p^ ' ' then begin
if not f then inc(c);
if c = n then break;
f:=true;
end
else if f then f:=false;
inc(p);
inc(rv);
end;
wordpos:=rv;
end;
// cut word number N from string S
function wordcut(s: string; n: integer): string;
begin
wordcut:=copy(s,wordpos(s,n+1),length(s)-wordpos(s,n+1)+1);
end;