第一次上机作业

//数字互换作业//


public class Exercise {
	public static void main(String[] args) {
		int a = 100;
		int b = 200;
		int tmp;
		tmp = a;
		a = b;
		b = tmp;
		System.out.println("交换后的a:"+ a + ";b:" + b);
		}
}

　　

 

 

//个十百千万相加//

import java.util.Scanner;

public class Demo1 extends Exercise {

    public static void main(String[] args) {
                System.out.println("请输入一个1~1000的整数：");
                Scanner ab = new Scanner(System.in);
                int a = ab.nextInt();
                int b, c, d, e, sum;
                e = a / 1000;
                b = a / 100 % 10;
                c = a  / 10 % 10;
                d = a % 10;
                sum = b +c +d +e;
                System.out.println("结果为" + sum);
    }
}

import java.util.Scanner;

public class Demo1 extends Exercise {

    public static void main(String[] args) {
                System.out.println("请输入华氏度：");
                Scanner ab = new Scanner(System.in);
                int a = ab.nextInt();
                int she;
                she = (a - 32)* 5 / 9;
                System.out.println("结果为"+she);
    }
}

 

 

import java.util.Scanner;

public class Demo1 extends Exercise {
    char a = 'A';
    system.out.println((char)(a + 32));
}