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![](https://rs.olm.vn/images/avt/0.png?1311)
const fi='input.txt';
fo='output.txt';
var f1,f2:text;
st:string[125];
a:array[1..125]of string;
i,d,dem,kt,j:integer;
begin
assign(f1,fi); reset(f1);
assign(f2,fo); rewrite(f2);
readln(f1,st);
d:=length(st);
dem:=1;
a[1]:=st[1];
for i:=1 to d do
begin
kt:=0;
for j:=1 to dem do
if a[j]=st[i] 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(f2,a[i],' xuat hien ',dem1,' lan');
end;
close(f1);
close(f2);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
Program HOC24;
var s: string;
tg,d,max,i: byte;
code: integer;
begin
write('Nhap xau : '); readln(s);
// cau a
for i:=1 to length(s) do if s[i] in ['a'..'z'] then write(upcase(s[i]));
//------
writeln;
//-cau b
for i:=length(s) downto 1 do if s[i] in ['0'..'9'] then write(s[i]);
//------
writeln;
//---cau c
d:=0;
for i:= 1 to length(s) do
if s[i] in ['0'..'9'] then
begin
val(s[i],tg,code);
if tg>max then max:=tg;
d:=d+1;
end;
if d=0 then write('Khong co chu so trong day') else write('Chu so lon nhat la : ',max);
readln
end.
uses crt;
var st,st1:string;
d,i,d1,max,x,y:integer;
begin
clrscr;
write('Nhap xau:'); readln(st);
d:=length(st);
writeln('Day cac ki tu thuong doi sang chu hoa la: ');
for i:=1 to d do
if st[i] in ['a'..'z'] then write(upcase(st[i]):4);
st1:='';
for i:=1 to d do
if st[i] in ['0'..'9'] then st1:=st1+st[i];
d1:=length(st1);
for i:=d1 downto 1 do
write(st1[i]:4);
writeln;
max:=0;
for i:=1 to d1 do
begin
val(st1[i],x,y);
if max<x then max:=x;
end;
writeln('Chu so lon nhat trong xau la: ',max);
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] in ['a'..'z'] then upcase(st[i]);
writeln(st);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var st:string;
i,d:integer;
begin
clrscr;
readln(st);
d:=length(st);
for i:=1 to d do
if (st[i]='a') or (st[i]='A') then st[i]:='b';
writeln(st);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
const fi='dulieu.txt';
var f1:text;
st:string;
i,d:integer;
begin
clrscr;
assign(f1,fi); rewrite(f1);
write('Nhap xau:'); readln(st);
d:=length(st);
for i:=1 to d do
if (st[i] in ['A'..Z']) or (st[i] in ['0'..'9']) or (st[i]=#32) then write(f1,st[i]);
close(f1);
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
var st,s:string;
i,d,dem,kt,j,dem1:integer;
begin
clrscr;
write('Nhap xau:'); readln(s);
writeln('Xau vua nhap la: ',s);
d:=length(s);
for i:=1 to d do
if s[i]=#32 then delete(s,i,1);
dem:=1;
st[1]:=s[1];
for i:=1 to d do
begin
kt:=0;
for j:=1 to dem do
if s[i]=st[j] then kt:=1;
if kt=0 then
begin
inc(dem);
st[dem]:=s[i];
end;
end;
for i:=1 to dem do
begin
dem1:=0;
for j:=1 to d do
if st[i]=s[j] then inc(dem1);
writeln(st[i],' xuat hien ',dem1,' lan');
end;
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
uses crt;
const fi='kiemtra.txt';
var f1:text;
a:array[1..100]of integer;
min,n,i:integer;
{----------------chuong-trinh-con-------------------}
function nn(x,y:integer):integer;
begin
if x<y then nn:=x
else nn:=y;
end;
{-----------------chuong-trinh-chinh-----------------}
begin
clrscr;
write('nhap n='); readln(n);
for i:=1 to n do
begin
write('A[',i,']='); readln(a[i]);
end;
min:=nn(a[1],a[2]);
for i:=3 to n do
if min>a[i] then min:=a[i];
writeln(min);
readln;
end.
Mình xin sửa lại một chút:
uses crt;
const fi='kiemtra.txt';
var f1:text;
a:array[1..100]of integer;
min,n,i:integer;
{----------------chuong-trinh-con-------------------}
function nn(x,y:integer):integer;
begin
if x<y then nn:=x
else nn:=y;
end;
{-----------------chuong-trinh-chinh-----------------}
begin
clrscr;
assign(f1,fi); reset(f1);
readln(f1,n);
for i:=1 to n do
read(f1,a[i]);
min:=nn(a[1],a[2]);
for i:=3 to n do
if min>a[i] then min:=a[i];
writeln(min);
readln;
end.
![](https://rs.olm.vn/images/avt/0.png?1311)
#include <bits/stdc++.h>
using namespace std;
long long i,a[100],n;
int main()
{
freopen("songuyen.txt","r",stdin);
n=20;
for (i=1; i<=n; i++) cin>>a[i];
for (i=1; i<=n; i++) cout<<a[i]<<" ";
return 0;
}
#include <bits/stdc++.h>
using namespace std;
string st,d;
int main()
{
freopen("dkt.inp","r",stdin);
cin>>st;
d=st.length();
for (int i=0; i<=d-1; i++)
st[i]-=32;
cout<<st;
return 0;
}