package
baitap20;
import
java.util.Scanner;
public
class
java20 {
public
static
void
main(String[] args) {//vidu1();//vidu4();//vd2();//vd3();//vd5();
vidu6
();}
public
static
void
vidu1() {Scanner sc\=
new
Scanner(System.
in
);System.
out
.print("nhap dtb");
double
dtb\=sc.nextDouble(); String kq\=(dtb\>5.0)?"dau":"rot"; String xeploai;
if
(dtb\>=9) {xeploai\="xuat sac"; }
else
if
(dtb\>=7) {xeploai\="kha gioi"; }
else
if
(dtb\>5) {xeploai\="tb"; }
else
{xeploai\="yeu"; }System.
out
.println("dtb\n"+xeploai); System.
out
.println("xep loai\n"+kq); }
public
static
void
vd2(){ Scanner sc \=
new
Scanner(System.
in
);
double
a \= 6, b \= 3;
if
(a!=0){
double
x \= -b/a; System.
out
.println("x = "+x); }
else
{
if
( b \== 0){ System.
out
.println("pTVSN"); }
else
{ System.
out
.println("PTVN"); } } }
public
static
void
vd3(){ Scanner sc \=
new
Scanner(System.
in
); System.
out
.print("Nhap ngay: ");
int
Wday \= sc.nextInt();
switch
(Wday){
case
2: System.
out
.println("Monday - firts day");
break
;
case
3,4,5,6: System.
out
.println("Woking day");
break
;
case
7,8: System.
out
.println("Monday - firts day");
break
; } }
public
static
void
vidu4() {Scanner sc\=
new
Scanner(System.
in
);System.
out
.println("nhap a");
int
a\=sc.nextInt();
System.
out
.println("nhap b");
int
b\=sc.nextInt();
double
ketqua;
char
c;System.
out
.println("nhap toán tử: +, -, *, /");c\=sc.next().charAt(0);
switch
(c) {
case
'+':ketqua \= a + b; System.
out
.println(a + " + " + b + " = " + ketqua);
break
;
case
'-':ketqua \= a - b; System.
out
.println(a + " - " + b + " = " + ketqua);
break
;
case
'*':ketqua \= a * b; System.
out
.println(a + " * " + b + " = " + ketqua);
break
;
case
'/':ketqua \= a / b; System.
out
.println(a + " / " + b + " = " + ketqua);
break
;
default
: System.
out
.println("Nhap sai");
break
;}}