uses
crt;
var
st: string;
c: char;
begin
clrscr;
write('Stroka 1: ');
readln(st);
write('Stroka 2: ');
readln(c);
delete(st,pos(c,st),1);
write('Stroka 3: ',st);
readkey;
end.
Вариант 2
uses crt;
var
str : string;
c : char;
begin
clrscr;
writeln('Enter string');
readln(str);
writeln('Ener char');
readln(c);
while pos(c,str)<>0 do delete(str,pos(c,str),1);
writeln('result : ',str);
readkey;
end.