Var a , b , c : Real ; BEGIN Writeln (' Nhap do dai 3 canh cua tam giac : ') ; Write (' a = ') ; Readln ( a ) ; Write (' b = ') ; Readln ( b ) ; Write (' c = ') ; Readln ( c ) ; If ( a + b > c ) and ( b + c > a ) and ( c + a > b ) and ( a > 0 ) and ( b > 0 ) and ( c > 0 ) Then Writeln (' Thoa man : Day la 3 canh cua mot tam giac ') Else Writeln (' Khong thoa man ! ') ; Readln ; END . Var Tong , So : Real ; I , N , Dem : Integer ; BEGIN Write (' Bao nhieu so : ') ; Readln ( N ) ; Tong := 0 ; Dem := 0 ; For I := 1 To N Do Begin Write (' So = ') ; Readln ( So ) ; If ( So > 10 ) and ( So < 20 ) Then Begin Tong := Tong + So ; Dem := Dem + 1 ; End ; End ; Writeln (' So cac so >10 va <20 la : ', Dem ) ; Writeln (' Tong cua chung la :', Tong ) ; Readln ; END . Var Max , a , b , c , d : Real ; BEGIN Writeln (' Nhap gia tri cua 4 so : ') ; Write (' a = ') ; Readln ( a ) ; Write (' b = ') ; Readln ( b ) ; Write (' c = ') ; Readln ( c ) ; Write (' d = ') ; Readln ( d ) ; Max := a ; If Max < b Then Max := b ; If Max < c Then Max := c ; If Max < d Then Max := d ; Writeln (' Gia tri lon nhat la : ', Max ) ; Readln ; END . Var Thu , Ngay , Thang : Byte ; Nam : Integer ; BEGIN Write (' Doc Ngay Thang Nam : ') ; Readln ( Ngay , Thang , Nam ) ; Nam := 1900 + ( Nam mod 1900 ) ; If Thang < 3 Then Begin Thang := Thang + 12 ; Nam := Nam - 1 ; End ; Thu := Abs ( Ngay + Thang * 2 + ( Thang + 1 ) * 3 div 5 + Nam + Nam div 4 ) mod 7 ; Case Thu Of 0 : Writeln (' Chu Nhat ') ; 1 : Writeln (' Thu Hai ') ; 2 : Writeln (' Thu Ba ') ; 3 : Writeln (' Thu Tu ') ; 4 : Writeln (' Thu Nam ') ; 5 : Writeln (' Thu Sau ') ; 6 : Writeln (' Thu Bay ') ; End ; Readln ; END . Uses Crt ; Var SBD : Integer; Van , Toan , Ngoaingu , Tongdiem : Real ; BEGIN Clrscr ; Write (' So bao danh : ') ; Readln( SBD ) ; Write (' Diem toan : ') ; Readln( Toan ) ; Write (' Diem ngoai ngu : ') ; Readln( Ngoaingu ) ; Write (' Diem van : ') ; Readln ( Van ) ; Tongdiem := Toan + Van + Ngoaingu ; Clrscr ; Writeln (' Phieu Bao Diem ') ; Writeln (' So bao danh : ', SBD ) ; Writeln (' Diem van : ', Van ) ; Writeln (' Diem toan : ', Toan ) ; Writeln (' Diem ngoai ngu : ', Ngoaingu) ; Writeln (' Tong diem : ', Tongdiem) ; If Tongdiem >= 15 Then Writeln(' Ban da trung tuyen ') Else Writeln(' Ban khong trung tuyen ') ; Readln ; END . Uses Crt ; Var a , b , T : Real ; Pt : Char ; BEGIN Clrscr ; Write (' a = ') ; Readln( a ) ; Write (' b = ') ; Readln( b ) ; Write (' Phep tinh thuc hien la (+ - * /) : ') ; Readln( Pt ) ; If Pt = '+’ Then T := a + b ; If Pt = '-’ Then T := a - b ; If Pt = '*’ Then T := a * b ; If Pt = '/’ Then T := a / b ; Write ( a , pt , b , ' = ', T ) ; Readln ; END . Uses Crt; Var m , Delta : Real ; BEGIN Clrscr; Write (' m = ') ; Readln( m ) ; Delta := sqr( m-2 ) - 4 ; If Delta < 0 Then Writeln(' Phuong trinh vo nghiem ') Else Begin If Delta = 0 Then Writeln(' Phuong trinh co nghiem kep X= ', -( m - 2 ) / 2 ) Else Begin Writeln(' Phuong trinh co 2 nghiem : ') ; Writeln (' X1 = ', ( -(m-2) + sqrt(delta) ) / 2 ) ; Writeln (' X2 = ', ( -(m-2) - sqrt(Delta) ) / 2 ) ; End ; End ; Readln ; END . Uses Crt ; Var N , M : Integer ; Begin Clrscr ; Write(' N , M = ') ; Readln( N , M ) ; If ( (N + M) mod 2 = 0 ) Then Writeln(' Dung ! ') Else Writeln(' Sai ! ') ; Readln ; END . Var i : Byte ; (* chỉ số chạy *) p : word ; (* tích số *) BEGIN p := 1; (* cho giá trò ban đầu của tích *) For i := 1 to 10 Do (* cho i chạy từ 1 tới 10 *) p := p * i ; (* lần lượt nhân i với p *) Write (' 1 * 2 * . * 10 = ', p ) ; Readln ; END . Uses Crt ; Var a : Array[ 'A' 'Z' ] of integer; (* mảng bộ đếm *) ch : char ; (* biến nhập kí tựù *) i : byte ; (* chỉ số của lần gõ phím *) BEGIN Clrscr ; For ch :='A' to 'Z' Do a[ch] := 0 ; (* xả bộ đếm *) Writeln (' Go phim 50 lan ') ; For i := 1 To 50 Do (* thực hiện 100 lần *) Begin ch :=Readkey ; (* nhập kí tự vào Ch không cần gõ Enter *) ch := Upcase(ch) ; (* Đỗi chữ thường thành chữ hoa *) a[ch] := a[ch] + 1 ; End; Writeln (' So lan xuat hien cac ki tu la :') ; For ch :='A' to 'Z' do (* Kiểm tra bộ đếm từ 'A' tới 'Z' *) If a[ch] > 0 Then (* Nếu Ch có xuất hiện *) Writeln (ch , a[ch] : 4 , ' lan . ') ; (* Viết ra màn hình kí tự và số lần xuất hiện *) Readln ; END . a) Var n , i : Word ; S : Real ; BEGIN Write (' Nhap n : ') ; Readln (n) ; S := 0 ; For i := 1 To n Do S := S + 1 / sqr(i) ; Writeln (' S = ', S:0:2) ; Readln ; END . b) Var n , i , j , p : Word ; S : Real ; BEGIN Write (' Nhap n : ') ; Readln(n) ; p := 1 ; s := 0 ; For i :=1 To n Do Begin p := p * i ; (* tính i *) S := S + 1 / p ; End ; Writeln (' S = ', S:0:2) ; Readln ; END . Var i , n : Byte ; p : Real ; Begin Write(' Nhap n : ') ; Readln (n) ; p := 1 ; For i := 1 To n Do p := p * ( 1 + 1/sqr(i) ) ; Writeln(' p = ', p:10:5 ) ; Readln ; End . Uses Crt ; Var i , n : Integer ; tong: Real ; BEGIN Clrscr ; Write (' Cho so tu nhien n : ') ; Readln (n) ; tong :=0 ; i :=1 ; While i <= n Do Begin tong := tong + 1/i ; i := i + 1 ; End ; Writeln (' Tong can tim la : ', tong:12:6 ) ; Readln ; END . Uses Crt ; Var i , n : Integer ; a , giatri : Real ; BEGIN Clrscr ; Write (' Cho so a : ') ; Readln(a) ; Write (' Cho so mu n : ') ; Readln(n) ; i := 1 ; giatri := 1 ; While i <= n Do Begin giatri := giatri * a ; i:= i+1 ; End ; Writeln(' a mu n bang : ', giatri ) ; Readln ; END . Uses Crt; Var A : Array [1 100] Of Integer; i , j , n : Integer ; BEGIN Clrscr ; Write(' Do dai cua day so N = ') ; Readln (N) ; For I := 1 To N Do Begin Write ('A[', i , ']= ') ; Readln ( A[i] ) ; End ; Writeln (' Cac so khac nhau la : ') ; Writeln ( A[1] ) ; i := 2 ; While i <= N Do Begin j := 1 ; While ( j < i ) and ( A[j] <> A[i] ) Do inc(j) ; If j = i Then Writeln( A[i] ) ; i :=i + 1 ; End ; Readln ; END . Uses Crt; Var A : Array [1 100] Of Integer ; i , j , n , T : Integer ; BEGIN Clrscr ; Write(' Do dai cua day so N = ') ; Readln (N) ; Writeln (' Nhap day so : ') ; For i := 1 To N Do Begin Write('A[', i ,'] = ') ; Readln ( A[i] ) ; End ; i := 1 ; While (i <= n-1) Do Begin j := i+1; While j<=n do Begin If A[j] < A[i] then Begin T := A[j]; A[j ] := A[i]; A[i] := T ; End ; j := j + 1; End ; i := i + 1; End ; Writeln(' Day sau khi sap xep : ') ; For i := 1 To N Do Write(A[i] : 4) ; Readln ; END . Uses Crt ; Var b : Array[1 100] Of Real; a : Real ; n , i : Byte ; BEGIN Clrscr ; Write ('Nhap do dai cua day so : ') ; Readln(n) ; Writeln (' Nhap cac phan tu cua day : ') ; For i := 1 To n Do Begin Write (' b[', i ,'] = ') ; Readln( b[i] ) ; End ; Write (' Nhap so thuc a : ') ; Readln(a) ; Writeln (' Cac phan tu lon hon a cua day : ') ; i:=1; Repeat If ( b[i] > a ) Then Writeln (' b[', i ,'] = ', b[i]:8:2 ) ; inc(i) ; Until i > n ; Readln ; END . Uses crt ; Var a , b : Array[1 50] Of Integer ; n , m , i , j , k : Byte ; trung : Boolean ; BEGIN Clrscr ; Write (' Nhap do dai cua day so nguyen : ') ; Readln(n) ; Writeln (' Nhap cac phan tu cua day : ') ; For i := 1 To N do Begin Write (' a[', i ,'] = ') ; Readln( a[i] ) ; End ; i := 1 ; m := 0 ; Repeat trung := false ; j := i + 1; Repeat If ( j <= n ) and ( a[i] = a[j] ) Then trung := true ; inc (j) ; Until trung or ( j > n ) ; If trung Then Begin m := m + 1; b[m] := a[i] ; writeln ( b[m] : 4 ) ; End ; inc(i) ; Until i > n ; If m > 1 Then Begin i := 1 ; Repeat j := i + 1 ; Repeat trung := false ; If b[i] = b[j] Then trung := true ; If trung Then Begin If j < m Then For k := j To m - 1 Do b[k] := b[k + 1] ; m := m - 1 ; dec ( j ) ; End ; inc ( j ) ; Until j > m ; inc ( i ) ; Until i > m ; End ; If m > 0 Then For k := 1 To m Do Write ( b[k] : 4 ) ; Readln ; END . uses crt ; var thang : Byte ; tien , lai , x : Real ; BEGIN clrscr ; writeln (' Chuong trinh tinh thoi gian rut tien lai ') ; write (' So tien lai muon rut ra : ') ; readln(x) ; tien := 1000 ; thang :=1 ; repeat lai := tien * 8 / 100 ; tien := tien + lai ; thang := thang + 1 ; until tien >= x ; writeln (' Ban phai gui tien trong ', thang div 12 , ' nam ', thang mod 12 ,' thang .') ; writeln (' Khi do so tien ban rut ra duoc la ', tien:12:2 ,' dong .') ; readln ; END . Uses crt ; Var a : Array [1 100] Of Integer ; n , i : Byte ; d : integer ; BEGIN Clrscr ; Writeln (' Tim USCLN cua N so :') ; Write (' Nhap so N : ') ; Readln(n) ; Writeln ('Nhap ', N ,' so : ') ; For i := 1 To n Do Begin Write(' So thu ', i ,' = ') ; Readln( a[i] ) ; End ; For i := 1 To n-1 Do Repeat d := a[i] ; a[i] := a[ i+1 ] mod a[i] ; a[i+1] := d ; Until a[i] = 0 ; Writeln (' USCLN cua ', N ,' so la : ', a[n] ) ; Readln ; END . Procedure Change ( n : integer ; Var St : String ) ; (* thủ tục chuyển số tự nhiên n cho trước sang hệ cơ số 2 và được lưu ở trong xâu St *) Type b : Array[0 1] Of Char = ('0' , '1') ; Var du , So : Integer ; S : String ; Begin S := '' ; (* xâu rỗng *) So := n ; Repeat Du := So mod 2 ; So :=So div 2 ; S := b[du] + s ; Until So = 0 ; St := S ; End ; Uses Crt ; Var a, b, c, x1, x2: real; (*================================*) Procedure Nhapabc(var aa,bb,cc: real); Begin Write('a='); Readln(aa); Write('b='); Readln(bb); Write('c='); Readln(cc); End; (*=================================*) Procedure GPTB2; Var Delta: real; Begin Delta:=sqr(b)-4*a*c; If Delta<0 then Writeln('Phuong trinh vo nghiem.') Else If Delta=0 then Begin Write('Phuong trinh co nghiem kep : '); Write('x1,2=',-b/(2*a):8:2); End Else Begin x1:=(-b+sqrt(Delta))/(2*a); x2:=(-b-sqrt(Delta))/(2*a); Writeln('Phuong trinh co 2 nghiem phan biet la :'); Writeln('X1=',x1:8:2, 'X2=',x2:8:2); End; End; (*================================*) BEGIN (* CT chính *) Clrscr; Writeln(' Giai Phuong Trinh Bac Hai Voi Cac He So :'); Nhapabc(a,b,c); If a<>0 then GPTB2 Else Writeln(' Khong phai phuong trinh bac hai '); Readln ; END . Procedure Insert ( St1 : String ; Var St2 : String ;Vt : Byte ) ; (* chèn xâu St1 vào St2 bắt đầu từ vò trí Vt *) Var i : Byte ; S : String ; Begin If ( Vt > length(St2) Or ( Vt < 1 ) Then Write(' Khong the chen ra ngoai xau ') ; Else Begin S := '' ; (* xâu rỗng *) For i := 1 To (Vt - 1) Do S := S + St2[i] ; S := S + St1 ; For i := Vt To length(St2) Do S := S + St2[i] ; St2 := S ; End ; End ; Uses Crt; Var a, b, c: real ; (*================================*) Procedure Nhap(Var a, b, c: real); Procedure input (Var a: real; tenbien: Char); Begin Repeat Write('Nhap ' + tenbien+' = '); Readln(a); Until (a>=0); End; Begin (* bắt đầu thủ tục nhập *) Input(a, 'a'); Input(b, 'b'); Input(c, 'c'); End; (* kết thúc thủ tục nhập *) (*================================*) Procedure Kiemtra(a, b, c: Real); Begin If (a<b+c) and (b<a+c) and (c<a+b) then Writeln(a:0:2, ', ', b:0:2, ' va ', c:0:2, ' lap thanh ba canh cua tam giac ') Else Writeln('Khong lap thanh ba canh cua tam giac') ; End; (*===============================*) Procedure Trung_tuyen (a, b, c: Real); Var ma, mb, mc: real; Begin ma:=sqrt((2*sqr(b)+2*sqr(c)-sqr(a))/4); mb:=sqrt((2*sqr(a)+2*sqr(c)-sqr(b))/4); mc:=sqrt((2*sqr(a)+2*sqr(b)-sqr(c))/4); Writeln('Cac trung tuyen cua tam giac la : ') ; Writeln('ma=', ma:0:2, ' mb=', mb:0:2, ' mc=', mc:0:2); End; (*================================*) Procedure Dientich (a, b, c: real); Var p, S: real; Begin p:=(a+b+c)/2; S:=sqrt(p*(p-a)*(p-b)*(p-c)); Writeln('Dien tich =', S:0:2); End; (*================================*) BEGIN (* Chương trình chính *) Clrscr; Nhap(a, b, c); Kiemtra(a, b, c); Dientich(a, b, c); Trung_tuyen(a, b, c); Readln; END . Uses Crt; Var X, Y, Z: byte; Begin Clrscr; Writeln('Giai phuong trinh X+Y+Z=12 trong pham vi ' + 'so nguyen khong am voi dieu kien x<4'); For X:=0 to 3 do For Y:=0 to 12 do For Z:=0 to 12 do If (X+Y+Z=12) then Writeln(' x=',X,' y=',Y, 'z=',Z); Readln; End. Uses Crt; Var N, a, b, c, X, Y, Z, i: Integer; Begin Clrscr; Write(' N, a, b, c = '); Readln(N, a, b,c); If (a+b+c-3<N) then Begin Writeln('Phuong trinh vo nghiem'); Readln; Exit; End Else Begin Writeln('Phuong trinh co nghiem la:'); Writeln('x': 10, 'y': 10, 'z':10); i:=4; For X:=0 to (a-1) do For Y:=0 to (b-1) do For Z:=0 to (c-1) do If (X+Y+Z=N) then Begin Writeln(x: 10, y: 10, z: 10); inc(i); If i=24 then Begin Write('Nhan Enter de tiep tuc .'); Readln; i :=0; End; End ; End ; Write('Nhan Enter de ket thuc .'); Readln; End. Uses Crt; Var xau1,xau2,xau: string; (*==================================*) Procedure compare(s1, s2: string; Var kq: string); Var i: byte; (*===============================*) Function kt(ch: char; st: string): boolean; (* Kiểm tra xem kí tự Ch có trong xâu St không . Nếu có thì hàm trả về giá trò True . Nếu không thì hàm trả về giá trò False *) Begin kt:=pos(ch,st)<>0; End; (*================================*) Begin (* Thân của thủ tục Compare*) kq:=''; (* Xâu rỗng *) For i:=1 to length(s1) do If (not kt(s1[i],kq)) and (kt(s1[i],s2)) then kq:=concat(kq,s1[i]); End; (*==============================*) BEGIN Clrscr; Writeln('Nhap 2 xau S1 va S2 :'); Write('S1: '); Readln(xau1); Write('S2: '); Readln(xau2); Compare(xau1, xau2, xau); If xau<>'' then Writeln('Xau chung la: ',xau) Else Writeln('Khong co ki tu nao trong ca hai xau '); Write('Nhan ENTER de ket thuc .'); Readln; END . Uses Crt; Const M=100; Var S: array[1 M] of string; max, min, i, j, n: byte; (*===============================*) Function D(U,V: string): byte; (*Trả về tổng số loại kí tự không giống nhau trong 2 xâu U và V *) Var k, id: byte; s, luu: string; Begin luu:=''; (* Xâu rỗng *) For id:=1 to length(U) do If (pos(U[id],V)=0) and (pos(U[id],luu)=0) then luu:=concat(luu,U[id]); For id:=1 to length(V) do If(pos(V[id],U) = 0) and (pos(V[id],luu)=0) then luu:= concat(luu,V[id]); d:=length(luu); End; (*=================================*) Procedure nhap; Begin Repeat Write('So xau ki tu (>=2):') ; Readln(n); If n<2 then Writeln(#7,'Co ',n,' xau ki tu nen khong the ' + 'so sanh duoc'); Until n>=2; Writeln('Nhap ',n,' xau ki tu :'); For i:=1 to n do Begin Write('S',i,'='); Readln(S[i]); End; End ; (*===============================*) BEGIN (* Chương trình chính *) Clrscr; nhap; max:=0; min:=255; For i:=1 to n-1 do For j:=i+1 to n do Begin If max<d(S[i],S[j]) then max:=d(S[i],S[j]); If min>d(S[i],S[j]) then min:=d(S[i],S[j]); End; Write('Max(d(Si,Sj)=',max,' Min(d(Si,Sj)=',min); Readln; END . Uses Crt; Type uoc_nguyen_to=array[1 50] of longint; Var u, N: longint; i, dem: integer; a: uoc_nguyen_to; (*================================*) Procedure nhap(Var NN:longint); Begin Repeat Write('Nhap N='); Readln(NN); Until NN>=0; End; (*=================================*) Procedure viet; Begin If dem=0 then Writeln('So ',N,' khong the phan tich thanh ' + 'tich cua cac so nguyen to') Else If dem=1 then Writeln(N, '=', a[dem]) Else Begin Write(N,'='); For i:=1 to dem-1 do Write(a[i],'*'); Writeln(a[dem]); End; End; (*================================*) Procedure phantich(N1:longint); Begin If N1>1 then Begin u:=2; dem:=0; Repeat If (N1 mod u=0) then Begin inc(dem); a[dem]:=u; N1:=N1 div u; End Else inc(u); Until N1=1; End Else dem:=0; Viet; End; (*==============================*) BEGIN (* Main Program *) Clrscr; Writeln('Phan tich so N thanh tich cua cac so nguyen to :'); nhap(N); phantich(N); Write('Nhan Enter de ket thuc .'); Readln; END . Uses Crt ; Var a : Array[1 10, 2 9] Of Byte ; i, j : Byte ; BEGIN Clrscr ; For i := 1 To 10 Do For j := 2 To 9 Do a[i, j] := i*j ; Writeln(' Bang cuu chuong : ') ; Writeln ; For i := 1 To 10 Do For j := 2 to 9 do Write ( j:4 , 'x' , i:2 , '=' , a[i , j]:2) ; (* hết 80 cột tự động xuống hàng *) Readln ; END . Var m , n , k , s : Word ; tb : real ; BEGIN Writeln('Nhap 2 so nguyen duong m, n :') ; Write (' m = ') ; Readln(m) ; Write (' n = ') ; Readln(n); If m > n Then (* đỗi chỗ để m <= n *) Begin k := m ; m := n ; n := k ; End ; s := 0 ; For k := m To n do s := s + sqr(k) ; tb := s / (n - m + 1) ; Writeln ('Trung binh cong bimh phuong cac so ' + 'nguyen tu m den n la: ', tb:12:2); Readln ; END . Var m , n , i , j : Byte ; a : Array[1 100, 1 100] Of Real; BEGIN Write ('Nhap cac kich thuoc cua mang hai chieu : ') ; Write (' So hang m = ') ; Readln(m) ; Write (' So cot n = ') ; Readln(n) ; Writeln (' Nhap cac phan tu cua mang : ') ; For i := 1 To m Do For j := 1 To n Do Begin Write ('a[', i:2, ', ' , j:2 ,']=') ; Readln(a[i, j]) ; End ; Readln ; END . Var a : Array[1 20] Of Byte ; i : Byte ; BEGIN a[1] :=1; a[2] :=1; For i:=3 to 20 do a[i]:=a[i-1]+a[i-2] ; END . Var a : Array [1 100] Of Word ; i, N : Byte ; S : Real ; BEGIN Write (' Nhap so N>=2 : ') ; Readln(n) ; a[1] := 1 ; a[2] := 2 ; For i := 3 To N Do a[i] := 2*a[i-1]+a[i-2] ; S := 0 ; For i := 1 to N do S := S+1/sqr(a[i]) ; Writeln (' S = ', S:12:6) ; Readln ; END . var a:array[1 100,1 100]of byte; n,i,j,k,l,ba:byte; d:boolean; BEGIN write(' Nhap kich thuoc cua mang hai chieu NxN. N = ');readln(n); for i:=1 to n do for j:=1 to n do begin ba:=0; repeat d:=FALSE; if j>1 then for k:=1 to j-1 do if a[i,k]=ba then d:=true; if i>1 then for k:=1 to i-1 do if a[k,j]=ba then d:=true; ba:=ba+1; until not d; a[i,j]:=ba-1; end; for i:=1 to n do for j:=1 to n do write(a[i,j]:8); readln; END . . i := 1 To 50 Do (* thực hiện 100 lần *) Begin ch :=Readkey ; (* nhập kí tự vào Ch không cần gõ Enter *) ch := Upcase(ch) ; (* Đỗi chữ thường thành chữ. Writeln (ch , a[ch] : 4 , ' lan . ') ; (* Viết ra màn hình kí tự và số lần xuất hiện *) Readln ; END . a) Var n , i : Word ; S : Real ; BEGIN