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Câu 2: 

uses crt;

var a,b:integer;

{-----------------chuong-trinh-con-------------------}

function ucln(x,y:integer):integer;

var i,uc:integer;

begin

if x<y then 

begin

uc:=1;

for i:=1 to x do 

  if (x mod i=0) and (y mod i=0) then  

begin

if uc<i then uc:=i;

end;

end

else begin

uc:=1;

for i:=1 to y do 

  if (x mod i=0) and (y mod i=0) then  

begin

if uc<i then uc:=i;

end;

end;

ucln:=uc;

end;

{--------------------------chuong-trinh-chinh------------------------}

begin

clrscr;

write('Nhap a='); readln(a);

write('Nhap b='); readln(b);

writeln(a,'/',b,'=',a div ucln(a,b),'/',b div ucln(a,b));

readln;

end.

Câu 1: 

const fi='songuyen.inp';

fo='tong.out';

var f1,f2:text;

a:array[1..100]of integer;

i,n,t:integer;

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

n:=0;

while not eoln(f1) do 

  begin

n:=n+1;

read(f1,a[n]);

end;

t:=0;

for i:=1 to n do 

  if a[i] mod 2=0 then t:=t+a[i];

writeln(f2,t);

close(f1);

close(f2);

end.

uses crt;

const fi='baitap.txt';

var f1:text;

a:array[1..100]of integer;

n,i:integer;

begin

clrscr;

assign(f1,fi); rewrite(f1);

write('Nhap n='); readln(n);

for i:=1 to n do 

  begin

write('A[',i,']='); readln(a[i]);

end;

writeln(f1,n);

for i:=1 to n do 

  write(f1,a[i]:4);

close(f1);

readln;

end.

4 tháng 5 2021

uses crt;
const fi='baitap.txt';
var f1:text;
a:array[1..100]of integer;
i,n:integer;
begin
clrscr;
assign(f1,fi); rewrite(f1);
readln(n);
writeln(f1,n);
for i:=1 to n do
  begin
   read(a[i]);
   write(f1,a[i],'  ');
  end;
close(f1);
readln;
end.

4 tháng 5 2021

Uses crt; Var f1,f2:text; i,n,max:integer; a:array[1..100] of integer; Begin Assign(f1,'baitap.txt');reset(f1); Assign(f2,'solonnhat.txt');rewrite(f2); While not eof(f1) do Begin Read(f1,n,a[i]); Max:=a[1]; For i:=2 to n do if a[i]>max then max:=a[i]; End; Writeln(f2,'solonnhatla:',max); Close(f1);close(f2); End.

4 tháng 5 2021

uses crt;
var n,max :integer;
    f1,f2:text;
begin
clrscr;
assign(f1,'baitap.txt'); reset(f1);
assign(f2,'solonhat.txt'); rewrite(f2);
max:=0;
while not eof(f1) do
  begin
  read(f1,n);
  if max <n then max:=n;
  end;
writeln('solonhatla: ',max:5);
write(f2,max);
close(f1);close(f2);
readln;
end.

25 tháng 7 2021

cau 1:

uses crt;

var a:array[1..100] of integer;

n,i,min: integer;

begin

readln(n);

for i:=1 to n do

readln(a[i]);

min:=a[1];

for i:=2 to n do

if min>a[i] then min=a[i];

writeln(a[i]);

readln;

end.

cau 2:

uses crt;

g:text;

s:string;

const fo='CHUSO.TXT';

begin

assign(g,fo);

rewrite(g);

readln(s);

for i:=1 to length(s) do

if not((s[i] in ['a'..'z'])and(s[i] in ['A'..'Z])) then delete(s,i,1);

writeln(g,s);

end.

#include <bits/stdc++.h>

using namespace std;

string st;

int d,i,dem;

int main()

{

freopen("xau.inp","r",stdin);

freopen("xau.out","w",stdout);

cin>>st;

d=st.length();

dem=0;

for (i=0; i<=d-1; i++)

if (st[i]=='a') dem++;

cout<<dem;

return 0;

}

3 tháng 3 2021

a)

PROGRAM BAI1a;

VAR N, Tle, Tchan: integer;

BEGIN

          Write ('Nhap N =');

          Readln (N);

          If (N mod 2) = 0 Then

          Tle := N*((N - 2)/2 + 1)/2;

          Tchan := (N + 2)*((N - 2)/2 + 1)/2;

          If (N mod 2) = 1 Then

          Tle := (N + 1)*((N-1)/2 +1)/2;

          Tchan := (N + 1)*((N - 3)/2 + 1)/2;

          WRITELN ('Sle =', Sle, 'Schan =', Schan);

          READLN;

          END.

const fi='tong.inp';

fo='tong.out';

var f1,f2:text;

a:array[1..100]of integer;

n,i,t:integer;

begin

assign(f1,fi); reset(f1);

assign(f2,fo); rewrite(f2);

readln(f1,n);

for i:=1 to n do 

  read(f1,a[i]);

t:=0;

for i:=1 to n do 

  t:=t+a[i];

writeln(f2,t);

close(f1);

close(f2);

end.

uses crt;

const fi='kq.txt';

var a:array[1..10]of integer;

i,n:integer;

f1:text;

begin

clrscr;

n:=10;

for i:=1 to n do readln(a[i]);

assign(f1,fi); rewrite(f1);

for i:=1 to n do 

  begin

if (n%5<>0) then write(f1,a[i]:4);

else writeln(f1);

end;

close(f1);

readln;

end.