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uses crt;
var st:string;
i,dem:integer;
begin
clrscr;
readln(st);
writeln(length(st));
for i:=5 to 8 do write(st[i]);
writeln;
dem:=0;
for i:=1 to length(st) do
if st[i]='b' then dem:=dem+1;
writeln(dem);
readln;
end.
Bài 1:
uses crt;
var S:String;
vt:integer;
begin
clrscr;
Write(‘Nhap 1 xau:’); Readln(S);
While pos(‘nang’,s)>0 do
Begin
Vt:= pos(‘nang’,s);
Delete(s,vt,4);
Insert(‘mua’,s ,vt);
End;
Writeln(‘Xau sau khi thay the ’,s);
Readln;
End.
Bài 2:
uses crt;
var st:string;
d,i,kt:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
kt:=0;
for i:=1 to d do
if st[i]<>st[d-i+1] then kt:=1;
if kt=0 then writeln(st,' la xau doi xung')
else writeln(st,' khong la xau doi xung');
readln;
end.
uses crt;
var st:string;
d,i:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
for i:=1 to d do
if not(st[i] in ['a'..'z']) and not(st[i] in ['A'..'Z']) then write(st[i]);
readln;
end.
uses crt;
var st:string;
n,vt,d,i:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
write('Nhap vi tri can xoa:'); readln(vt);
write('Nhap so ki tu can xoa:'); readln(n);
delete(st,vt,n);
writeln('Xau sau khi xoa la: ',st);
readln;
end.
Use crt;
Var S : String;
P: longint;
Begin
Write('Nhap s: '); readln (S);
For P:=length(S) downto 1 do
Write(P);
Readln;
End.
uses crt;
var st:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
writeln('Xau ban vua nhap la: ',st);
writeln('Xau nguoc la: ');
for i:=d downto 1 do
write(st[i]:4);
readln;
end.
#include <bits/stdc++.h>
using namespace std;
string st;
int i;
int main()
{
cin>>st;
for (i=0; i<=2; i++) cout<<st[i];
return 0;
}