By GokiSoft.com|
19:45 15/04/2024|
Java Basic
Java Basic- Tổng hợp các bài tập ôn luyện java căn bản phần 2
Bài 1.
Viết chương trình java tạo và thực thi theo menu sau:
1. Nhập vào tên của bạn
2. Hiển thị tên vừa nhập.
3. Thoát.
Bài 2. Viết chương trình java thực thi theo menu sau:
1. Nhập vào 2 số nguyên
2. Hiển thị 2 số vừa nhập
3. Tổng 2 số
4. Tích 2 số
5. Hiệu 2 số
6. Thương 2 số.
7. Thoát.
Bài 3. Viết chương trình java thực thi theo menu sau:
1. Nhập vào họ tên của bạn
2. Nhập vào điểm toán lý hóa.
3. Tính tổng 3 môn
4. Tính trung bình 3 môn.
5. Thoát.
Bài 4.
Viết chương trình java cho phép tạo và thực thi theo menu sau:
1. Nhập vào một số nguyên dương n.
2. Tính tổng các số từ 1 đến n
3. Kiểm tra n có là số nguyên tố
4. Kiểm tra n có là số hoàn hảo.
5. In ra các số nguyên tố từ 1 đến n
6. In ra các số hoàn hảo từ 1 đến n.
7. Hiển thị số n thành tích các thừa số nguyên tố.
8. Thoát
(Hiển thị 1 số nguyên dương thành tích các thừa số nguyên tố: n = 24 thì in ra: n = 2^3*3)
Bài 5.
Viết chương trình java tạo và thực thi theo menu sau:
1. Nhập vào số nguyên dương n
2. Tính tổng: 1 + 1/2 + 1/3 + ... + 1/n
3. Tính tổng: 1 + 1/2! + 1/3! + ... + 1/n!
4. Thoát.
Bài 6.
Viết chương trình java tạo và thực thi theo menu sau:
1. Nhập vào số nguyên dương n, số nguyên x bất kỳ
2. Tính tổng: 1 + x + x^2/2! + x^3/3! + ... + x^n / n!
3. Tính tổng: 1 +x – x^2/2! + x^3/3! + ... + (-1)^n-1 * x^n / n!
4. Thoát.
Tags:
Phản hồi từ học viên
5
(Dựa trên đánh giá ngày hôm nay)
![NgNhan [APROTRAIN_ADF]](https://www.gravatar.com/avatar/8c2f7eb13764d610abe695cc366696a6.jpg?s=80&d=mm&r=g){kind=avatar}
NgNhan
2020-06-03 03:37:17
Bài 1:
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("Enter your name: ");
String name = scanner.nextLine();
System.out.println("Your name is: " + name);
}
}
![cuonglee [C1907L]](https://www.gravatar.com/avatar/b8c48ea2d04ab5a37bda2c50310d8a5c.jpg?s=80&d=mm&r=g){kind=avatar}
cuonglee
2020-03-24 15:16:33
/*
* To change this license header, choose License Headers in Project Properties.
* To change this template file, choose Tools | Templates
* and open the template in the editor.
*/
package OOP;
import java.util.Scanner;
/**
*bai 1 va 2
* @author Admin b
*/
public class onTap {
int a,b;
void nhap(){
Scanner add = new Scanner(System.in);
System.out.println("Moi ban nhap so nguyen a: ");
a = Integer.parseInt(add.nextLine());
System.out.println("Moi ban nhap so nguyen b: ");
b = Integer.parseInt(add.nextLine());
}
void tong(){
int sum = this.a + this.b;
System.out.println(sum);
}
void tich(){
int mul = this.a * this.b;
System.out.println(mul);
}
void thuong(){
int Div = this.a * this.b;
System.out.println(Div);
}
void showNumber(){
System.out.println(this.a);
System.out.println(this.b);
System.out.println();
}
public static void main(String[] args) {
Scanner add = new Scanner(System.in);
onTap moi = new onTap();
boolean exit = false;
// System.out.println("nhap ho ten cua ban");
// String username = add.nextLine();
// System.out.println("ten cua ban la :"+username);
int choose;
do{
showMenu();
choose =Integer.parseInt(add.nextLine());
switch(choose){
case 1:
System.out.println("ban da chon muc 1");
moi.nhap();
break;
case 2:
System.out.println("hien thi 2 so ");
moi.showNumber();
break;
case 3:
System.out.println("tong 2 so");
moi.tong();
break;
case 4:
System.out.println("tich 2 so");
moi.tich();
break;
case 5:
System.out.println("thuong 2 so");
moi.thuong();
break;
case 6:
System.out.println("thoat");
break;
default:
System.out.println("you choosee");
break;
}
}while(choose != 6);
}
static void showMenu(){
System.out.println("=================================");
System.out.println("==============Menu================");
System.out.println("=================================");
System.out.println("1.nhap hai so");
System.out.println("2.hien thi 2 so");
System.out.println("3.tong hai so");
System.out.println("4.tich hai so");
System.out.println("5.thuong hai so");
System.out.println("6.thoat");
System.out.println("=================================");
}
}
![Phạm Kim Anh [JavaFree]](https://www.gravatar.com/avatar/2a2cc19e3234e41e7f8a049d835aaac7.jpg?s=80&d=mm&r=g){kind=avatar}
Phạm Kim Anh
2020-03-20 12:34:51
package oop;
import java.util.Scanner;
public class Bai_04 {
static int n;
public Bai_04() {
// TODO Auto-generated constructor stub
}
public int getN() {
return n;
}
public void setN(int n) {
this.n = n;
}
void nhap() {
do {
Scanner sc = new Scanner(System.in);
System.out.println("Moi ban nhap vao 1 so nguyen duong: ");
n = Integer.parseInt(sc.nextLine());
}while( n <= 0 );
}
void xuat(String y) {
System.out.println(y );
}
//tinh tong cac so tu 1 den n
long tinhTong(int n) {
long s = 0;
for(int i = 1; i <= n; i++) {
s = s+i;
}
return s;
}
//kiem tra n co la so nguyen to hay k.
static int kiemTraNguyenTo(int n) {
if(n == 0 || n == 1)
return 0;
for( int i = 2; i <= Math.sqrt(n); i++) {
if( n%i == 0) {
return -1;
}
}
return 1;
}
//kiem tra n co la so hoan hao hay k.
static int kiemTraSoHoanHao(int n) {
int tong = 0;
for( int i = 1; i < n ; i++) {
if( n%i == 0)
tong = tong + i;
}
if(tong == n) {
return 1;
}
return 0;
}
//hien thi so n thanh tich cac thua so nguyen to
void phanTichThuaSNT(int n) {
int dem;
for(int i = 2; i <= n; i++) {
dem = 0;
while( n%i == 0 ) {
++dem;
n /= i;
}
if(dem > 0) {
System.out.print(i);
if(dem > 1) {
System.out.print("^" +dem);
}
if(n > i) {
System.out.print(" * ");
}
}
}
System.out.println();
}
public static void main(String[] args) {
Bai_04 b4 = new Bai_04();
Scanner sc = new Scanner(System.in);
int choose;
boolean exit = false;
do {
menu();
System.out.println("Moi ban nhap lua chon duoi menu: ");
choose = Integer.parseInt(sc.nextLine());
switch(choose) {
case 1:
b4.nhap();
break;
case 2:
b4.xuat("Tong cac so tu 1 den " +n+" la: "+b4.tinhTong(n));
break;
case 3:
if(kiemTraNguyenTo(n) == 1) {
System.out.println( n +" la so nguyen to.");
}else {
System.out.println(n +" khong la so nguyen to.");
}
break;
case 4:
if(kiemTraSoHoanHao(n) == 1) {
System.out.println(n +" la so hoan hao.");
}else {
System.out.println(n +" khong la so hoan hao.");
}
break;
case 5:
System.out.println("Cac so nguyen to la: ");
for( int i = 1; i <= n; i++) {
int check = kiemTraNguyenTo(i);
if(check == 1) {
System.out.print(i+" ");
}
}
System.out.println();
break;
case 6:
System.out.println("Cac so hoan hao la: ");
for( int i = 1; i <= n; i++) {
int check = kiemTraSoHoanHao(i);
if(check == 1) {
System.out.print(i+" ");
}
}
System.out.println();
break;
case 7:
b4.phanTichThuaSNT(n);
break;
case 8:
System.out.println("Tam biet!");
exit = true;
break;
default:
System.out.println("Moi ban nhap lua chon duoi menu");
break;
}
}while( choose != 8);
}
//menu
static void menu() {
System.out.println("====================================================");
System.out.println("1. Nhap vao mot so nguyen duong n");
System.out.println("2. Tinh tong cac so tu 1 den n");
System.out.println("3. Kiem tra n co la so nguyen to");
System.out.println("4. Kiem tra n co la so hoan hao");
System.out.println("5. In ra cac so nguyen to tu 1 den n");
System.out.println("6. In ra cac so hoan hao tu 1 den n");
System.out.println("7. Hien thi so n thanh tich cac thua so nguyen to");
System.out.println("8. Thoat");
}
}
Phạm Kim Anh
2020-03-20 12:34:51
package oop;
import java.util.Scanner;
public class Bai_04 {
static int n;
public Bai_04() {
// TODO Auto-generated constructor stub
}
public int getN() {
return n;
}
public void setN(int n) {
this.n = n;
}
void nhap() {
do {
Scanner sc = new Scanner(System.in);
System.out.println("Moi ban nhap vao 1 so nguyen duong: ");
n = Integer.parseInt(sc.nextLine());
}while( n <= 0 );
}
void xuat(String y) {
System.out.println(y );
}
//tinh tong cac so tu 1 den n
long tinhTong(int n) {
long s = 0;
for(int i = 1; i <= n; i++) {
s = s+i;
}
return s;
}
//kiem tra n co la so nguyen to hay k.
static int kiemTraNguyenTo(int n) {
if(n == 0 || n == 1)
return 0;
for( int i = 2; i <= Math.sqrt(n); i++) {
if( n%i == 0) {
return -1;
}
}
return 1;
}
//kiem tra n co la so hoan hao hay k.
static int kiemTraSoHoanHao(int n) {
int tong = 0;
for( int i = 1; i < n ; i++) {
if( n%i == 0)
tong = tong + i;
}
if(tong == n) {
return 1;
}
return 0;
}
//hien thi so n thanh tich cac thua so nguyen to
void phanTichThuaSNT(int n) {
int dem;
for(int i = 2; i <= n; i++) {
dem = 0;
while( n%i == 0 ) {
++dem;
n /= i;
}
if(dem > 0) {
System.out.print(i);
if(dem > 1) {
System.out.print("^" +dem);
}
if(n > i) {
System.out.print(" * ");
}
}
}
System.out.println();
}
public static void main(String[] args) {
Bai_04 b4 = new Bai_04();
Scanner sc = new Scanner(System.in);
int choose;
boolean exit = false;
do {
menu();
System.out.println("Moi ban nhap lua chon duoi menu: ");
choose = Integer.parseInt(sc.nextLine());
switch(choose) {
case 1:
b4.nhap();
break;
case 2:
b4.xuat("Tong cac so tu 1 den " +n+" la: "+b4.tinhTong(n));
break;
case 3:
if(kiemTraNguyenTo(n) == 1) {
System.out.println( n +" la so nguyen to.");
}else {
System.out.println(n +" khong la so nguyen to.");
}
break;
case 4:
if(kiemTraSoHoanHao(n) == 1) {
System.out.println(n +" la so hoan hao.");
}else {
System.out.println(n +" khong la so hoan hao.");
}
break;
case 5:
System.out.println("Cac so nguyen to la: ");
for( int i = 1; i <= n; i++) {
int check = kiemTraNguyenTo(i);
if(check == 1) {
System.out.print(i+" ");
}
}
System.out.println();
break;
case 6:
System.out.println("Cac so hoan hao la: ");
for( int i = 1; i <= n; i++) {
int check = kiemTraSoHoanHao(i);
if(check == 1) {
System.out.print(i+" ");
}
}
System.out.println();
break;
case 7:
b4.phanTichThuaSNT(n);
break;
case 8:
System.out.println("Tam biet!");
exit = true;
break;
default:
System.out.println("Moi ban nhap lua chon duoi menu");
break;
}
}while( choose != 8);
}
//menu
static void menu() {
System.out.println("====================================================");
System.out.println("1. Nhap vao mot so nguyen duong n");
System.out.println("2. Tinh tong cac so tu 1 den n");
System.out.println("3. Kiem tra n co la so nguyen to");
System.out.println("4. Kiem tra n co la so hoan hao");
System.out.println("5. In ra cac so nguyen to tu 1 den n");
System.out.println("6. In ra cac so hoan hao tu 1 den n");
System.out.println("7. Hien thi so n thanh tich cac thua so nguyen to");
System.out.println("8. Thoat");
}
}
Phạm Kim Anh
2020-03-20 11:20:27
package oop;
import java.util.Scanner;
public class Bai5{
static int n;
public int getN() {
return n;
}
public void setN(int n) {
this.n = n;
}
//nhap vao 2 so nguyen
void nhap() {
Scanner sc = new Scanner(System.in);
do {
System.out.println("Moi ban nhap so nguyen duong n: ");
n = Integer.parseInt(sc.nextLine());
}while(this.n<0);
}
//Tinh tong: 1+1/2+1/3+...+1/n
double tong1(int n) {
double s1 = 0;
for(int i = 1; i <= n; i++) {
s1 = s1 + (double)1/i;
}
return s1;
}
//Tinh tong: 1+1/2!+1/3!+...+1/n!
double tong2( int n ) {
double s2 = 0;
int p = 1;
for(int i = 1; i <= n; i++) {
p = p*i;
s2 = s2 + (double)1/p;
}
return s2;
}
//thuong 2 so
void xuat(String y) {
System.out.println(y );
}
public static void main(String[] args) {
Bai5 b5 = new Bai5();
Scanner sc = new Scanner(System.in);
boolean exit = false;
int choose;
do {
menu();
System.out.println("Moi ban nhap lua chon: ");
choose =Integer.parseInt(sc.nextLine());
switch(choose) {
case 1:
b5.nhap();
break;
case 2:
b5.xuat("Tong cua 1 + 1/2 +...+1/"+n+" la: " +b5.tong1(n));
break;
case 3:
b5.xuat("Tong cua 1 + 1/2! +...+1/"+n+"! la: " +b5.tong2(n));
break;
case 4:
System.out.println("Goodbye!");
exit = true;
break;
default:
System.out.println("Moi ban chon lua chon: ");
break;
}
}while(choose != 4);
}
static void menu() {
System.out.println("---------------------------------");
System.out.println("1. Nhap vao so nguyen duong n.");
System.out.println("2. Tinh tong: 1 + 1/2 + 1/3 +...+ 1/n.");
System.out.println("3. Tinh tong: 1 + 1/2! + 1/3! +...+ 1/n!.");
System.out.println("4. Thoat.");
System.out.println("---------------------------------");
}
}
Phạm Kim Anh
2020-03-20 11:20:27
package oop;
import java.util.Scanner;
public class Bai5{
static int n;
public int getN() {
return n;
}
public void setN(int n) {
this.n = n;
}
//nhap vao 2 so nguyen
void nhap() {
Scanner sc = new Scanner(System.in);
do {
System.out.println("Moi ban nhap so nguyen duong n: ");
n = Integer.parseInt(sc.nextLine());
}while(this.n<0);
}
//Tinh tong: 1+1/2+1/3+...+1/n
double tong1(int n) {
double s1 = 0;
for(int i = 1; i <= n; i++) {
s1 = s1 + (double)1/i;
}
return s1;
}
//Tinh tong: 1+1/2!+1/3!+...+1/n!
double tong2( int n ) {
double s2 = 0;
int p = 1;
for(int i = 1; i <= n; i++) {
p = p*i;
s2 = s2 + (double)1/p;
}
return s2;
}
//thuong 2 so
void xuat(String y) {
System.out.println(y );
}
public static void main(String[] args) {
Bai5 b5 = new Bai5();
Scanner sc = new Scanner(System.in);
boolean exit = false;
int choose;
do {
menu();
System.out.println("Moi ban nhap lua chon: ");
choose =Integer.parseInt(sc.nextLine());
switch(choose) {
case 1:
b5.nhap();
break;
case 2:
b5.xuat("Tong cua 1 + 1/2 +...+1/"+n+" la: " +b5.tong1(n));
break;
case 3:
b5.xuat("Tong cua 1 + 1/2! +...+1/"+n+"! la: " +b5.tong2(n));
break;
case 4:
System.out.println("Goodbye!");
exit = true;
break;
default:
System.out.println("Moi ban chon lua chon: ");
break;
}
}while(choose != 4);
}
static void menu() {
System.out.println("---------------------------------");
System.out.println("1. Nhap vao so nguyen duong n.");
System.out.println("2. Tinh tong: 1 + 1/2 + 1/3 +...+ 1/n.");
System.out.println("3. Tinh tong: 1 + 1/2! + 1/3! +...+ 1/n!.");
System.out.println("4. Thoat.");
System.out.println("---------------------------------");
}
}
Phạm Kim Anh
2020-03-20 10:41:06
package oop;
import java.util.Scanner;
public class Bai2 {
int a, b;
//nhap vao 2 so nguyen
void nhap() {
Scanner sc = new Scanner(System.in);
System.out.println("Moi ban nhap so nguyen a: ");
a = Integer.parseInt(sc.nextLine());
System.out.println("Moi ban nhap so nguyen b: ");
b = Integer.parseInt(sc.nextLine());
System.out.println();
}
void show() {
System.out.println("So nguyen a vua nhap la: "+this.a);
System.out.println("So nguyen b vua nhap la: "+this.b);
System.out.println();
}
void tong2so() {
long tong = this.a + this.b;
System.out.println("Tong 2 so la: " +tong);
}
//tich 2 so
void tich2so() {
long tich = this.a * this.b;
System.out.println("Tich 2 so la:"+tich);
}
//hieu 2 so
void hieu2so() {
long hieu = this.a - this.b;
System.out.println("Hieu 2 so la: "+hieu);
}
//thuong 2 so
void thuong2so() {
float thuong = (float)a / (float)b;
System.out.println("Thuong 2 so la: "+thuong);
}
public static void main(String[] args) {
Bai2 b2 = new Bai2 ();
Scanner sc = new Scanner(System.in);
boolean exit = false;
int choose;
do {
menu();
System.out.println("Moi ban nhap lua chon: ");
choose =Integer.parseInt(sc.nextLine());
switch(choose) {
case 1:
b2.nhap();
break;
case 2:
b2.show();
break;
case 3:
b2.tong2so();
break;
case 4:
b2.tich2so();
break;
case 5:
b2.hieu2so();
break;
case 6:
b2.thuong2so();
break;
case 7:
System.out.println("Goodbye!");
exit = true;
break;
default:
System.out.println("Moi ban chon lua chon: ");
break;
}
}while(choose != 7);
}
static void menu() {
System.out.println("---------------------------------");
System.out.println("1. Nhap vao 2 so nguyen.");
System.out.println("2. Hien thi 2 so vua nhap.");
System.out.println("3. Tong 2 so.");
System.out.println("4. Tich 2 so.");
System.out.println("5. Hieu 2 so.");
System.out.println("6. Thuong 2 so.");
System.out.println("7. Thoat.");
System.out.println("---------------------------------");
}
}
Phạm Kim Anh
2020-03-20 10:41:05
package oop;
import java.util.Scanner;
public class Bai2 {
int a, b;
//nhap vao 2 so nguyen
void nhap() {
Scanner sc = new Scanner(System.in);
System.out.println("Moi ban nhap so nguyen a: ");
a = Integer.parseInt(sc.nextLine());
System.out.println("Moi ban nhap so nguyen b: ");
b = Integer.parseInt(sc.nextLine());
System.out.println();
}
void show() {
System.out.println("So nguyen a vua nhap la: "+this.a);
System.out.println("So nguyen b vua nhap la: "+this.b);
System.out.println();
}
void tong2so() {
long tong = this.a + this.b;
System.out.println("Tong 2 so la: " +tong);
}
//tich 2 so
void tich2so() {
long tich = this.a * this.b;
System.out.println("Tich 2 so la:"+tich);
}
//hieu 2 so
void hieu2so() {
long hieu = this.a - this.b;
System.out.println("Hieu 2 so la: "+hieu);
}
//thuong 2 so
void thuong2so() {
float thuong = (float)a / (float)b;
System.out.println("Thuong 2 so la: "+thuong);
}
public static void main(String[] args) {
Bai2 b2 = new Bai2 ();
Scanner sc = new Scanner(System.in);
boolean exit = false;
int choose;
do {
menu();
System.out.println("Moi ban nhap lua chon: ");
choose =Integer.parseInt(sc.nextLine());
switch(choose) {
case 1:
b2.nhap();
break;
case 2:
b2.show();
break;
case 3:
b2.tong2so();
break;
case 4:
b2.tich2so();
break;
case 5:
b2.hieu2so();
break;
case 6:
b2.thuong2so();
break;
case 7:
System.out.println("Goodbye!");
exit = true;
break;
default:
System.out.println("Moi ban chon lua chon: ");
break;
}
}while(choose != 7);
}
static void menu() {
System.out.println("---------------------------------");
System.out.println("1. Nhap vao 2 so nguyen.");
System.out.println("2. Hien thi 2 so vua nhap.");
System.out.println("3. Tong 2 so.");
System.out.println("4. Tich 2 so.");
System.out.println("5. Hieu 2 so.");
System.out.println("6. Thuong 2 so.");
System.out.println("7. Thoat.");
System.out.println("---------------------------------");
}
}
![Lê Xuân Dũng [JavaFree]](https://www.gravatar.com/avatar/af3e93d6e9bd94db12e2b8a1069aef68.jpg?s=80&d=mm&r=g){kind=avatar}
Lê Xuân Dũng
2020-03-20 02:57:55
//Bai 3:
package quanlydiemsv;
import java.util.Scanner;
public class QuanlyDiemSV {
public static void main(String[] args) {
int choose;
Scanner sc = new Scanner(System.in);
Ten ten = new Ten();
DiemSV diem = new DiemSV();
do{
showMenu();
choose = Integer.parseInt(sc.nextLine());
switch(choose){
case 1:
ten.NhapTen();
break;
case 2:
diem.NhapDiem();
break;
case 3:
diem.TinhTongDiem3Mon();
break;
case 4:
diem.TinhTrungbinhDiem3Mon();
break;
case 5:
System.out.println("Thoat!");
break;
default:
System.out.println("Nhap sai! Moi nhap lai!");
break;
}
} while (choose !=5);
}
static void showMenu(){
System.out.println("1. Nhap ho ten.");
System.out.println("2. Nhap diem Toan - Ly - Hoa.");
System.out.println("3. Tinh tong diem 3 mon Toan - Ly - Hoa");
System.out.println("4. Tinh trung binh diem 3 mon Toan - Ly - Hoa");
System.out.println("5. Thoat");
}
}
package quanlydiemsv;
import java.util.Scanner;
public class DiemSV {
private int diemToan;
private int diemLy;
private int diemHoa;
public DiemSV() {
}
public void NhapDiem(){
Scanner sc = new Scanner(System.in);
System.out.println("Nhap diem Toan: ");
diemToan = Integer.parseInt(sc.nextLine());
System.out.println("Nhap diem Ly: ");
diemLy = Integer.parseInt(sc.nextLine());
System.out.println("Nhap diem Hoa: ");
diemHoa = Integer.parseInt(sc.nextLine());
}
public void TinhTongDiem3Mon(){
// Ten ten = new Ten();
int tong = this.diemToan + this.diemLy + this.diemHoa;
System.out.println("Tong diem 3 mon Toan - Ly - Hoa bang: "+tong); // cua "+ten.HienTen()+"
}
public void TinhTrungbinhDiem3Mon(){
Ten ten = new Ten();
float tb = (float) (this.diemToan + this.diemLy + this.diemHoa)/3;
System.out.println("Trung binh diem 3 mon Toan - Ly - Hoa bang: "+tb);// cua "+ten.HienTen()+"
}
}
package quanlydiemsv;
import java.util.Scanner;
public class Ten {
private String name;
public Ten() {
}
public void NhapTen(){
Scanner sc = new Scanner(System.in);
System.out.println("Nhap ho ten: ");
this.name = sc.nextLine();
}
public String HienTen(){
return this.name;
}
}
Lê Xuân Dũng
2020-03-20 02:06:10
//Bai 2:
package menu_lam_viec_voi_2_so;
import java.util.Scanner;
public class Menu_Lam_viec_voi_2_so {
public static void main(String[] args) {
int choose;
Scanner sc = new Scanner(System.in);
HaiSo haiso = new HaiSo();
do {
showMenu();
choose = Integer.parseInt(sc.nextLine());
switch (choose) {
case 1:
haiso.Nhap2so();
break;
case 2:
haiso.Hien2so();
break;
case 3:
haiso.Tong2so();
;
break;
case 4:
haiso.Tich2so();
;
break;
case 5:
haiso.Hieu2so();
;
break;
case 6:
haiso.Thuong2so();
;
break;
case 7:
System.out.println("Thoat!");
break;
default:
System.out.println("Nhap sai!");
break;
}
} while (choose != 7);
}
static void showMenu() {
System.out.println("1. Nhap hai so.");
System.out.println("2. Hien thi 2 so.");
System.out.println("3. Tong 2 so.");
System.out.println("4. Tich 2 so.");
System.out.println("5. Hieu 2 so.");
System.out.println("6. Thuong 2 so.");
System.out.println("7. Thoat.");
}
}
package menu_lam_viec_voi_2_so;
import java.util.Scanner;
public class HaiSo {
private int a;
private int b;
public HaiSo() {
}
public void Nhap2so() {
Scanner sc = new Scanner(System.in);
System.out.println("Nhap vao so thu nhat: ");
this.a = Integer.parseInt(sc.nextLine());
System.out.println("Nhap vao so thu hai: ");
this.b = Integer.parseInt(sc.nextLine());
}
public void Hien2so() {
System.out.println("So thu nhat = "+a);
System.out.println("So thu hai = "+b);
}
public void Tong2so(){
int tong = this.a + this.b;
System.out.println("Tong 2 so la: "+tong);
}
public void Tich2so(){
int tich = this.a * this.b;
System.out.println("Tich 2 so la: "+tich);
}
public void Hieu2so(){
int hieu = this.a - this.b;
System.out.println("Hieu 2 so la: "+hieu);
}
public void Thuong2so(){
int thuong = this.a / this.b;
System.out.println("Thuong 2 so la: "+thuong);
}
}