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Cậu tham khảo nhé!!!
https://hoc24.vn/cau-hoi/viet-chuong-trinh-nhap-mot-xau-tu-ban-phim-thay-ky-tu-39a39-thanh-39i39-va-in-xau-da-thay-ra-man-hinh-thay-tat-ca-chu-39anh39-t.257698320219
uses crt;
var s:string;
begin
clrscr;
write('Nhap xau: '); readln(s);
while pos('a',s)<>0 do
begin
insert('i',s,pos('a',s));
delete(s,pos('a',s),1);
end;
write('Xau sau khi chuyen la : ',s);
readln;
end.
xau = input("Nhập vào một xâu bất kì: ")
xau_moi = xau.replace("choi", "hoc")
print("Xâu mới sau khi thay thế là:", xau_moi)
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.
const fi='kt.txt';
fo='kq.out';
var f1,f2:text;
s:string;
i,dem,d:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,s);
vt:=pos('anh',s);
while vt<>0 do
begin
delete(s,vt,3);
insert(s,vt,'em');
vt:=pos('anh',s);
end;
writeln(f2,s);
close(f1);
close(f2);
end.
1.
Program HOC24;
var s: string;
i: byte;
begin
write('Nhap xau : '); readln(s);
for i:=length(s) downto 1 do write(upcase(s[i]));
readln
end.
1:
uses crt;
var st:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
write('Dang dao nguoc cua xau la: ');
for i:=d downto 1 do
write(st[i]);
writeln;
for i:=1 to d do
st[i]:=upcase(st[i]);
write('Xau duoi dang in hoa la: ',st);
readln;
end.
2:
uses crt;
var st:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
i:=pos('anh',st);
while i<>0 do
begin
delete(st,i,3);
insert('em',st,i);
i:=pos('anh',st);
end;
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
while (st[i]=#32) and (st[i+1]=#32) do
begin
delete(st,i,1);
d:=length(st);
end;
writeln('Xau sau khi xu ly la: ',st);
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.
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 s:string;
i,d,dem:integer;
begin
clrscr;
write('Nhap xau S:'); readln(s);
d:=length(s);
writeln('Cac ki tu so co trong xau S:');
dem:=0;
for i:=1 to d do
if s[i] in ['0'..'9'] then
begin
write(s[i]:4);
inc(dem);
end;
writeln;
writeln('So ki tu chu so co trong xau S: ',dem);
for i:=1 to d do
if s[i] in ['0'..'9'] then s[i]:='A';
writeln('Xau sau khi doi la: ',s);
readln;
end.
