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uses crt;
var a:array[1..250]of integer;
i,n,t,dem:integer;
begin
clrscr;
write('n='); readln(n);
for i:=1 to n do
begin
write('a[',i,']'); readln(a[i]);
end;
{------------------------------xu-ly---------------------------}
dem:=0;
t:=0;
for i:=1 to n do
if a[i] mod 3=0 then
begin
inc(dem);
t:=t+a[i];
end;
writeln('so phan tu la boi cua 3 trong day nay la: ',dem);
writeln('tong cua cac phan tu la boi cua 3 trong day nay la: ',t);
readln;
end.
uses crt;
var m,n,dem,i:integer;
begin
clrscr;
write('nhap m='); readln(m);
write('nhap n='); readln(n);
if (m>0) and (n>0) then
begin
if m<n then
begin
dem:=0;
for i:=m to n do
if (i mod 2=1) then
begin
if (i mod 3<>0) or (i mod 5<>0) then inc(dem);
end;
writeln('so luong cac so le khong chia het cho 3 hoac 5 trong pham vi tu ',m,' toi ',n,' la: ',dem);
end
else writeln('vui long nhap m lon hon n');
end
else writeln('vui long nhap so lon hon 0');
readln;
end.
uses crt;
var a,b,c:integer;
begin
clrscr;
write('a='); readln(a);
write('b='); readln(b);
write('c='); readln(c);
if (a>0) and (b>0) and (c>0) then
begin
if (a+b>c) and (a+c>b) and (b+c>a) then
begin
if (a=b) and (b=c) then writeln('day la tam giac deu')
else writeln('day khong la tam giac deu');
end
else writeln('day khong la 3 canh trong mot tam giac');
end
else writeln('vui long nhap so lon hon 0');
readln;
end.
uses crt;
var st,st1:string;
d,d1:integer;
begin
clrscr;
write('nhap xau thu 1:'); readln(st);
write('nhap xau thu 2:'); readln(st1);
d:=length(st);
d1:=length(st1);
writeln('tong do dai hai xau la: ',d+d1);
readln;
end.
program ho_tro;
uses crt;
var a,b,c: integer;
begin
clrscr;
writeln(' nhap ba goc:'); readln(a,b,c);
if (a+b+c)=180 then writeln(' la 3 goc cua tam giac:')
else writeln(' k phai 3 goc cua tam giac:');
readln;
end.
uses crt;
var a,b,c,kt:integer;
begin
clrscr;
write('nhap a='); readln(a);
write('nhap b='); readln(b);
write('nhap c='); readln(c);
if (a+b>c) and (a+c>b) and (b+c>a) then
begin
write('day la tam giac ');
kt:=0;
if ((a=b)and(a<>c)and(b<>c)) or ((b=c)and(b<>a)and(b<>c)) or ((a=c)and(a<>b)and(c<>b)) then kt:=1;
if (a=b) and (b=c) then kt:=2;
if (sqr(a)=sqr(b)+sqr(c)) or (sqr(b)=sqr(a)+sqr(c)) or (sqr(c)=sqr(a)+sqr(b)) then kt:=3;
if kt=0 then write('thuong');
if kt=1 then write('can');
if kt=2 then write('deu');
if kt=3 then write('vuong');
end
else writeln('day khong phai la tam giac');
readln;
end.
1:
Program GIAI_PHUONG_TRINH_BACII;
Uses CRT;
Var a,b,c,D,x,x1,x2: real;
Begin
Clrscr;
Writeln('GIAI PHUONG TRINH BAC II: ');
Writeln('-------------------------------------------');
Write('Nhap he so a='); readln(a);
Write('Nhap he so b='); readln(b);
Write('Nhap he so c='); readln(c);
If a=0 then
If b=0 then
If c=0 then
Writeln('Phuong trinh co vo so nghiem')
Else Writeln('Phuong trinh vo nghiem')
Else Writeln('Phuong trinh co mot nghiem: x=',-c/b: 4: 2)
Else
Begin
D:=b*b-4*a*c;
If D=0 then Writeln('Phuong trinh co nghiem kep: x=',-b/(2*a): 4: 2)
Else
If D<0 then Writeln('Phuong trinh vo nghiem')
Else
Begin
x1:=(-b-sqrt(D))/(2*a);
x2:=(-b+sqrt(D))/(2*a);
Writeln('Phuong trinh co 2 nghiem la x1= ',x1:4:2 ,' va x2= ',x2:4:2);
End;
End;
Readln;
End.
2:
uses crt;
var a,b,c,max:integer;
begin
clrscr;
write('a='); readln(a);
write('b='); readln(b);
write('c='); readln(c);
max:=a;
if max<b then max:=b;
if max<c then max:=c;
writeln('so lon nhat la: ',max);
readln;
end.
3:
uses crt;
var a,b,c,kt:integer;
begin
clrscr;
write('nhap a='); readln(a);
write('nhap b='); readln(b);
write('nhap c='); readln(c);
if (a+b>c) and (a+c>b) and (b+c>a) then
begin
write('day la tam giac ');
kt:=0;
if ((a=b)and(a<>c)and(b<>c)) or ((b=c)and(b<>a)and(b<>c)) or ((a=c)and(a<>b)and(c<>b)) then kt:=1;
if (a=b) and (b=c) then kt:=2;
if (sqr(a)=sqr(b)+sqr(c)) or (sqr(b)=sqr(a)+sqr(c)) or (sqr(c)=sqr(a)+sqr(b)) then kt:=3;
if kt=0 then write('thuong');
if kt=1 then write('can');
if kt=2 then write('deu');
if kt=3 then write('vuong');
end
else writeln('day khong phai la tam giac');
readln;
end.
4:
uses crt;
var a:integer;
begin
clrscr;
write('a='); readln(a);
if a mod 2=0 then writeln(a,' la so chan')
else writeln(a,' la so le');
if a>0 then writeln(a,' la so duong')
else if a<0 then writeln(a,' la so am')
else writeln(a,' khong la so am cung khong la so duong');
readln;
end.
program hotrotinhoc;
var i,n: byte;
t: longint;
a: array[1..150] of integer;
begin
write('n='); readln(n);
t:=0;
for i:=1 to n do
begin
write('a[',i,']='); readln(a[i]);
if (a[i] mod 3=0) and (a[i] mod 5=0) then t:=t+a[i];
end;
writeln('Cac phan tu le trong mang : ');
for i:=1 to n do if a[i] mod 2=1 then write(a[i],' ');
writeln;
write('Tong phan tu chia het cho 3 va 5 la :',t);
readln
end.
uses crt;
var a:array[1..100]of integer;
i,n,t:integer;
begin
clrscr;
write('nhap n='); readln(n);
for i:=1 to n do
begin
write('a[',i,']='); readln(a[i]);
end;
{-------------------------xu-ly------------------------}
writeln('cac so le trong day la: ');
for i:=1 to n do
if a[i] mod 2=1 then write(a[i]:4);
writeln;
t:=0;
for i:=1 to n do
if (a[i] mod 3=0) and (a[i] mod 5=0) then t:=t+a[i];
writeln('tong cac phan tu chia het cho 3 va chia het cho 5 la: ',t);
readln;
end.
