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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 bai1;
uses crt;
var i:integer;
s,s1:string;
begin
clrscr;
write('nhap S:');readln(s);
while pos('C',s)<>0 do
begin
insert('LOP11A',s,pos('C',s));
delete(s,pos('C',s),1);
end;
writeln('xau sau khi bien doi la: ',s);
writeln('do dai cua xau tren la: ',length(s));
write('nhap s1:');readln(s1);
if s1[1]=s[1] then writeln('ki tu dau cua hai xau trung nhau')
else writeln('ki tu dau cua hai xau khong trung nhau');
readln;
end.
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.
uses crt;
var st:string;
d,i,dem:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
while st[1]=#32 do
begin
delete(st,1,1);
d:=length(st);
end;
while st[d]=#32 do
begin
delete(st,d,1);
d:=length(st);
end;
for i:=1 to d do
begin
while (st[i]=#32) and (st[i+1]=#32) do
begin
delete(st,i,1);
d:=length(st);
end;
end;
st[1]:=upcase(st[1]);
for i:=1 to d do
if st[i]=#32 then st[i+1]:=upcase(st[i+1]);
writeln('Ten cua ban sau khi viet dung la: ',st);
dem:=1;
for i:=1 to d do
if st[i]=#32 then inc(dem);
writeln('So tu cua xau la: ',dem);
readln;
end.
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;
b:char;
begin
clrscr;
write('Nhap xau st:'); readln(st);
d:=length(st);
write('Nhap ki tu b:'); readln(b);
dem:=0;
for i:=1 to d do
if b=st[i] then inc(dem);
writeln(dem);
readln;
end.
uses crt;
var a,b:string;
i,n,d,d1:integer;
begin
clrscr;
write('Nhap xau a:'); readln(a);
write('Nhap xau b:'); readln(b);
if a[length(a)]=b[1] then writeln('Ki tu cuoi cua xau a trung voi ki tu dau cua xau b')
else writeln('Ki tu cuoi cua xau a khong trung voi ki tu dau cua xau b');
dem:=0;
while pos(b,a)>0 do
begin
inc(dem);
delete(a,pos(b,a),length(b));
end;
writeln('Xau b xuat hien ',dem,' lan trong xau a');
readln;
end.