2021-01-25 08:51:25

/*
 * 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 lesson3;
import java.util.Scanner;

/**
 *
 * @author MyPC
 */
public class MainCalculator {
    public static void main(String[] args) {
        float x1,x2;
        Scanner scan = new Scanner(System.in);
        x1 = scan.nextFloat();
        x2 = scan.nextFloat();
        Calculator x = new Calculator();
        x.Cong(x1, x2);
        x.Tru(x1, x2);
        x.Nhan(x1, x2);
        x.Chia(x1, x2);
    }
}

/*
 * 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 lesson3;

/**
 *
 * @author MyPC
 */
public class Calculator {
    public float x1 , x2;
    public void Cong(float x1, float x2){
        System.out.println( (int)(x1+x2) ); 
    }
    public void Tru(float x1, float x2){
        System.out.println((int)(x1 - x2)); 
    }
    public void Nhan(float x1, float x2){
        System.out.println((int)(x1 * x2)); 
    }
    public void Chia(float x1, float x2){
        System.out.println(x1 / x2); 
    }
}

2020-03-19 06:52:44

/*
 * 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 Bt65;
import java.util.Scanner;
/**
 *
 * @author Administrator
 */
public class Main {
    public static void main(String[] args) {
        Calculator calculator = new Calculator();
        calculator.cong();
        calculator.tru();
        calculator.nhan();
        calculator.chia();
    }
}

/*
 * 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 Bt65;
import java.util.Scanner;
/**
 *
 * @author Administrator
 */
public class Calculator {
    private int a,b;
    float c;
    Scanner scan = new Scanner(System.in);
    
    public Calculator(){ 
    }
    
    public void cong(){
        System.out.println("Nhap hai so a va b:");
        System.out.println("Nhap a:");
        a  = scan.nextInt();
        System.out.println("Nhap b:");
        b = scan.nextInt();
        c = a+ b;
        System.out.println("Cong hai so = " + ( a+ b ));
        
    }
    public void tru(){
        System.out.println("Nhap hai so a va b:");
        System.out.println("Nhap a:");
        a  = scan.nextInt();
        System.out.println("Nhap b:");
        b = scan.nextInt();
        c = a - b;
        System.out.println("Tru hai so = " + ( a - b ));
        
    }
    public void nhan(){
        System.out.println("Nhap hai so a va b:");
        System.out.println("Nhap a:");
        a  = scan.nextInt();
        System.out.println("Nhap b:");
        b = scan.nextInt();
        c = a * b;
        System.out.println("Nhan hai so = " + ( a * b ));
        
    }
    public void chia(){
        System.out.println("Nhap hai so a va b:");
        System.out.println("Nhap a:");
        a  = scan.nextInt();
        System.out.println("Nhap b:");
        b = scan.nextInt();
        c = a / b;
        System.out.println("Chia hai so = " + ( a / b ));
        
    }
    
}

2020-03-16 13:19:58

package BT65;

public class calculator {
    float a,b;
    public float sum(float a, float b){
        float sum = a+b;
        return sum;
    }
    public float sub(float a, float b){
        float sub = a - b;
        return sub;
    }
    public float mul(float a, float b){
        float mul = a*b;
        return mul;
    }
    public float quo(float a, float b){
        float quo = a/b;
        return quo;
    }

}

package BT65;
import java.util.Scanner;
public class main {
    public static void main(String[] args) {
        calculator cal = new calculator();
        float a,b;
        Scanner sc = new Scanner(System.in);
        System.out.print("Nhập a: ");
        a= sc.nextFloat();
        sc.nextLine();
        System.out.print("Nhập b: ");
        b= sc.nextFloat();
       
        System.out.println("Summation a + b = "+cal.sum(a,b));
        System.out.println("Subtraction a - b = "+cal.sub(a,b));
        System.out.println("Multiplication a*b = "+cal.mul(a, b));
        System.out.println("quotient a/b = "+cal.quo(a, b));
    }
    
}

2020-03-16 13:19:56

package BT65;

public class calculator {
    float a,b;
    public float sum(float a, float b){
        float sum = a+b;
        return sum;
    }
    public float sub(float a, float b){
        float sub = a - b;
        return sub;
    }
    public float mul(float a, float b){
        float mul = a*b;
        return mul;
    }
    public float quo(float a, float b){
        float quo = a/b;
        return quo;
    }

}

package BT65;
import java.util.Scanner;
public class main {
    public static void main(String[] args) {
        calculator cal = new calculator();
        float a,b;
        Scanner sc = new Scanner(System.in);
        System.out.print("Nhập a: ");
        a= sc.nextFloat();
        sc.nextLine();
        System.out.print("Nhập b: ");
        b= sc.nextFloat();
       
        System.out.println("Summation a + b = "+cal.sum(a,b));
        System.out.println("Subtraction a - b = "+cal.sub(a,b));
        System.out.println("Multiplication a*b = "+cal.mul(a, b));
        System.out.println("quotient a/b = "+cal.quo(a, b));
    }
    
}

2020-03-16 12:34:31

Calculator:

package bt65;
import java.util.Scanner;
public class Calculator {
    public float a,b;
    
    public void insert() {
        Scanner scan = new Scanner(System.in);
        System.out.print("Nhập vào tham số thứ nhất: ");
        a = scan.nextFloat();
        scan.nextLine();
        System.out.print("Nhập vào tham số thứ hai: ");
        b = scan.nextFloat();
        scan.nextLine();
        
    }
    
    public float Addition(){
        System.out.print(a + " + " + b + " = " + (a+b));
        return a+b;
    }
    
    public float Subtraction(){  
        System.out.print(a + " - " + b + " = " + (a-b));    
        return a-b;
    }
    
    public float Multiplication(){
        System.out.print(a + " x " + b + " = " + (a*b));
        return a*b;
    }
    
    public float Division(){
        System.out.print(a + " / " + b + " = " + (a/b));
        return a/b;
    }
    
}

package bt65;
import java.util.Scanner;
public class Main {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        Calculator calculator = new Calculator();
        int choice;
        float a,b;
        do{
            System.out.println("\nMenu \n1.Addition.");
            System.out.println("2.Subtraction.");
            System.out.println("3.Multiplication");
            System.out.println("4.Division");
            System.out.println("5.Exit!!!");
            System.out.print("Nhập lựa chọn của bạn: ");
            choice = scan.nextInt();
            scan.nextLine();
            switch (choice) {
                case 1:
                    calculator.insert();
                    calculator.Addition();
                    break;
                case 2:
                    calculator.Subtraction();
                    break;
                case 3:
                    calculator.Multiplication();
                    break;
                case 4:
                    calculator.Division();
                    break;
                case 5:
                    System.out.print("EXIT!!!!");
                    break;
                default:
                    System.out.println("Lua chon cua ban chua chinh xac!!!");
                    break;
            }
        }while(choice!=5);
    }
    
}