Java第三次作业

1.输入两个数进行互换

import java.util.Scanner;


public class wang2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
   Scanner input=new Scanner(System.in);
   System.out.println("输入俩个数");
   int  a=input.nextInt();
   int  b=input.nextInt();
   int c;
   c=a;
   a=b;
   b=c;
   
   System.out.println(a);
   System.out.println(b);
   
   
    }

}

2.输入两个数进行平方

import java.util.Scanner;


public class wang2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
   Scanner input=new Scanner(System.in);
   System.out.println("输入俩个数");
   int  a=input.nextInt();
   int  b=input.nextInt();
   int c;
   c=a*a+b*b;
   
   System.out.println(c);
   
   
    }

}

3.输入商品的单价，数量求总价。活动打八折抹零计算价格。输入付款金额，计算找零并输出

import java.util.Scanner;


public class wang2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         Scanner input=new Scanner(System.in);
            System.out.println("输入商品单价");
            double a=input.nextDouble();
            System.out.println("输入商品数量");
            double b=input.nextDouble();
            double c = a*b;
            System.out.println("总价是"+c);
            double d=c*0.8;
            int e=(int)d/1;
            System.out.println("活动价是"+e);
            System.out.println("输入付款金额");
            int f=input.nextInt();
            int g=f-e;
            System.out.println("找零是"+g);
   
    }

}

4.输入百位数的各位和十位和百位

import java.util.Scanner;


public class wang2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         Scanner input=new Scanner(System.in);
            System.out.println("输入一个三位数");
            int a=input.nextInt();
            int ge=a%10;
            int shi=a%100/10;
            int bai=a/100;
            System.out.println("个位是"+ge);
            System.out.println("十位是"+shi);
            System.out.println("百位是"+bai);
   
    }

}

5.输入大写字母转换成小写字母

import java.util.Scanner;


public class wang2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input =new Scanner(System.in);
        System.out.println("任意输入一个大写字母");
        String m=input.next();
        char n;
        n=m.charAt(0);
        System.out.println((char)(n+32));
   
    }

}

6.输入两个较大的数

import java.util.Scanner;


public class wang2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("输入两个数");
        int a = input.nextInt();
        int b = input.nextInt();
        int max=a>b?a:b;
        System.out.println("输出较大数"+max);
   
    }

}