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uses crt;
var s:string;
i,d:integer;
begin
clrscr;
write('Nhap xau S:'); readln(s);
d:=length(s);
for i:=1 to d do
if (s[i] in ['a'..'z']) or (s[i] in ['A'..'Z']) then delete(s,i,1);
writeln('Xau sau khi xoa het ki tu chu la: ',s);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
string st;
int dem,i,d;
int main()
{
getline(cin,st);
d=st.length();
dem=0;
for (i=0; i<=d-1; i++)
if ((st[i]=='a') or (st[i]=='A')) dem++;
cout<<dem;
return 0;
}
Program HOC24;
var s: string;
i,d: byte;
begin
write('Nhap xau: '); readln(s);
while s[1]=#32 do delete(s,1,1);
while length(s)=#32 do delete(s,length(s),1);
while pos(#32#32,s)<>0 do delete(s,pos(#32#32,s),1);
d:=0;
for i:=1 to length(s) do if s[i]=#32 then d:=d+1;
write('Trong xau co ',d+1, ' tu');
readln
end.
string = input("Nhập vào một xâu kí tự: ")
count = string.count('tiền')
print('Xâu kí tự có ', count, 'từ "tiền"')
Program HOC24;
var S: string;
d,i: byte;
begin
write('S= '); readln(s);
For i:= length(s) downto 1 do write(s[i]);
writeln;
while s[length(s)]=#32 do delete(s,length(s),1);
while pos(#32#32,s)<>0 do delete(s,pos(#32#32,s),1);
while s[1]=#32 do delete(s,1,1);
d:=0;
for i:=1 to length(s) do d:=d+1;
write('So tu :',d);
readln
end.
uses crt;
var s:string[200];
i,d,dem:integer;
begin
clrscr;
write('Nhap xau:'); readln(s);
d:=length(s);
write('Xau viet theo chieu nguoc la: ');
for i:=d downto 1 do
write(st[i]);
writeln;
dem:=0;
for i:=1 to d do
if st[i]=#32 then inc(dem);
writeln('So tu la: ',dem);
readln;
end.
uses crt;
var st:string;
i,d,dem:integer;
begin
clrscr;
readln(st);
d:=length(st);
dem:=0;
for i:=1 to d do
if st[i]='H' then inc(dem);
writeln(dem);
readln;
end.
uses crt;
var st:string;
a:array[1..255]of string;
i,n,d,kt,j,dem,dem1,dem2:integer;
begin
clrscr;
readln(st);
d:=length(st);
dem:=1;
a[1]:=st[1];
for i:=1 to d do
begin
kt:=0;
for j:=1 to dem do
if a[j]=st[i] then kt:=1;
if kt=0 then
begin
dem:=dem+1;
a[dem]:=st[i];
end;
end;
dem1:=0;
dem2:=0;
for i:=1 to dem do
begin
if st[i] in ['A'..'Z'] then dem1:=dem1+1;
if st[i] in ['a'..'z'] then inc(dem1);
if st[i] in ['0'..'9'] then inc(dem2);
end;
writeln(dem1);
writeln(dem2);
readln;
end.