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![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var st:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
writeln('Xau vua nhap la: ',st);
for i:=1 to d do
if st[i]=#32 then st[i]:='_';
writeln('Xau thay the la: ',st);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
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.
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
int d,i,d1;
string st;
int main()
{
getline(cin,st);
d=st.length();
while (st[0]==32)
{
st.erase(0,1);
}
while (st[d-1]==32)
{
st.erase(d-1,1);
}
d1=st.length();
for (i=0; i<d1; i++)
if ((st[i]==32) && st[i+1]==32)
{
st.erase(i,1);
i--;
}
cout<<st;
return 0;
}
![](https://rs.olm.vn/images/avt/0.png?1311)
Var s,st:string;
i:integer;
Begin
Write('Nhap xau ');readln(s);
For i:=1 to length(s) do
If s[i] in ['0'..'9'] then st:=st+s[i];
Write('Cac ki tu so co trong day la ',st);
Readln
End.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var st:string;
i,d:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
writeln('Xau vua nhap la: ',st);
for i:=1 to d do
if st[i]=#32 then delete(st,i,1);
writeln('Xau moi la: ',st);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
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.
![](https://rs.olm.vn/images/avt/0.png?1311)
program stringManipulation;
var
st1, st2: string;
countN, i: integer;
begin
write('Nhap vao xau ki tu st1: ');
readln(st1);
countN := 0;
for i := 1 to length(st1) do
begin
if (st1[i] = 'N') or (st1[i] = 'n') then
begin
countN := countN + 1;
end;
end;
writeln('So ky tu N va n trong xau st1 la: ', countN);
st2 := '';
for i := 1 to length(st1) do
begin
if (st1[i] >= 'A') and (st1[i] <= 'Z') then
begin
st2 := st2 + st1[i];
end;
end;
writeln('Cac ky tu in hoa trong xau st1 la: ', st2);
write('Xau st1 viet theo chieu nguoc lai la: ');
for i := length(st1) downto 1 do
begin
write(st1[i]);
end;
readln;
end.
st1 = input("Nhập vào xâu kí tự: ")
count_n = 0
st2 = ""
for char in st1:
if char == 'N' or char == 'n':
count_n += 1
if char.isupper():
st2 += char
print("Số lần xuất hiện của kí tự 'N' và 'n' là:", count_n)
print("Xâu kí tự chỉ chứa kí tự in hoa là:", st2)
print("Xâu kí tự đảo ngược là:", st1[::-1])