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Program HOC24;
var s: string;
i: byte;
begin
write('Nhap xau :'); readln(s);
for i:=1 to length(s) do if s[i]<>'a' then write(s[i]);
readln
end.
uses crt;
var st:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
for i:=1 to d do
if st[i]='a' then delete(st,i,1);
writeln(st);
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.
Program Xau;
Uses crt;
Var St: String;
i: longint;
Begin
Clrscr;
Write('Nhap xau: '); Readln(St);
For i:=1 to length(St) do
St[i] := Upcase(St[i]);
Write('St = ',St);
Readln
End.
uses crt;
var a,b:string;
i,d:integer;
begin
clrscr;
write('Nhap xau a:'); readln(a);
d:=length(a);
b:='';
for i:=1 to d do
if a[i] in ['A'..'Z'] then b:=b+a[i];
writeln(b);
readln;
end.
uses crt;
const fi='vb.txt';
var f1:text;
st:string;
i,d:integer;
begin
clrscr;
assign(f1,fi); rewrite(f1);
readln(st);
d:=length(st);
for i:=1 to d do
if st[i] in ['A'..'Z'] then write(f1,st[i]:4);
close(f1);
readln;
end.
uses crt;
var st:string[50];
d,i:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
for i:=1 to d do
if st[i] in ['a'..'z'] then write(st[i]:4);
readln;
end.
Program HOC24;
var i,d1,d2: byte;
st1,st2: string[60];
begin
write('Nhap xau st1: '); readln(st1);
//---------------Câu 1-------------------
d1:=0; d2:=0;
for i:=1 to length(st1) do
begin
if st1[i]='A' then d1:=d1+1;
if st1[i]='a' then d2:=d2+1;
end;
writeln('Co ',d1,' ki tu A trong xau');
writeln('Co ',d2,' ki tu a trong xau');
//---------------------- Câu 2 --------------------
st2:='';
for i:=1 to length(st1) do if st1[i] in ['a'..'z'] then st2:=st2+st1[i];
writeln('Xau st2 la: ',st2);
//------------------------------Câu 3--------------------
for i:=1 to length(st1) do st1[i]:=upcase(st1[i]);
write('Xau st1 sau khi in hoa la: ',st1);
//--------------------------------------------------------
readln
end.
Bài 3:
uses crt;
const fi='teptong.txt';
var a,b:integer;
f1:text;
begin
clrscr;
assign(f1,fi); rewrite(f1);
readln(a,b);
writeln(a+b);
writeln(f1,a+b);
close(f1);
readln;
end.
uses crt;
var st:string;
a:array[1..255]of string;
i,d,dem,kt,j,dem1:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
a[1]:=st[1];
dem:=1;
for i:=1 to d do
begin
kt:=0;
for j:=1 to dem do
if st[i]=a[j] then kt:=1;
if kt=0 then
begin
inc(dem);
a[dem]:=st[i];
end;
end;
for i:=1 to dem do
begin
dem1:=0;
for j:=1 to d do
if a[i]=st[j] then inc(dem1);
writeln(a[i],' xuat hien ',dem1,' lan');
end;
readln;
end.
uses crt;
var a:string;
c:char;
i,dem:integer;
begin
clrscr;
readln(a);
readln(c);
dem:=0;
for i:=1 to length(a) do
if a[i]=c then dem:=dem+1;
writeln(dem);
readln;
end.