Question

用键盘输入A和B的值并求A+B的值用java怎么编写

Answer 1

public class Testa {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("从键盘输入A的值：");
double a = scanner.nextDouble();
System.out.println("从键盘输入B的值：");
double b = scanner.nextDouble();
System.out.println("A+B="+(a+b));
}
}

Answer 2

import java.util.Scanner;

public class sum{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("请输入A：");
int a = sc.nextInt();
System.out.println("请输入B：");
int b = sc.nextInt();
System.out.println("A+B="+(a+b));
}
}