Chương trình:
uses crt; {thu vien dung cho viec xoa man hinh}
var Dem:array[‘A’..‘Z’] of integer;
____S: String;
____ch: char;
____i: integer;
begin
____clrscr; {lenh xoa man hinh}
____write(‘Nhap xau S: ’);
____readln(S);
_for ch:= ‘A’ to ‘Z’ do
_______Dem[ch]:= 0;
_ for i:=1 to length(S) do
begin
if S[i] in ([‘a’..‘z’]) then {co the thay bang if (S[i] >= ‘a’) and (S[i] <= ‘z’) then}
begin
_________ch:=upcase(S[i]);
_________Dem[ch]:= Dem[ch]+1;
end;
end;
{for ch:= ‘A’ to ‘Z’ do
write(‘So lan xuat hien cua ’,ch, ‘ trong xau la ’, Dem[ch]);}
____writeln(‘So lan xuat hien cua cac chu cai trong xau la: ‘);
for ch:= ‘A’ to ‘Z’ do
_______write(ch:3);
____writeln;
for ch:= ‘A’ to ‘Z’ do
_______write(Dem[ch]:3);
____readln
end.
