java第三次作业

1.输入2个数，交换后输出

import java.util.Scanner;


public class text2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         Scanner input=new Scanner (System.in);
           System.out.println("输入一个数a");
           int a=input.nextInt();
           
           System.out.println("输入一个数b");
           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，求平方和

import java.util.Scanner;


public class text2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         Scanner input=new Scanner (System.in);
           System.out.println("输入一个数a");
           int a=input.nextInt();
           
           System.out.println("输入一个数b");
           int b=input.nextInt();
           int c;
           c=a*a+b*b;
           System.out.println(c);
        
    }

}

3.输入商品单价，数量，求总价。活动8折后抹零，计算活动价。输入付款金额，计算找零并输出

import java.util.Scanner;


public class text2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         Scanner input=new Scanner (System.in);
           System.out.println("输入单价a");
           int a=input.nextInt();
           
           System.out.println("输入数量b");
           int b=input.nextInt();
           
           int c;
           double d;
           c=a*b;
           d=c*(0.8)-c*(0.8)%1;
           System.out.println(c);
           System.out.println(d); 
           
           System.out.println("输入付款金额e");
           int e=input.nextInt();
           double f;
           f=e-d;
           System.out.println("计算找零"+f);
    }

}

4.输入一个三位数，求个位十位百位

import java.util.Scanner;


public class text2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
         Scanner input=new Scanner (System.in);
           System.out.println("输入三位数a");
           int a=input.nextInt();
           int c,d,e;
           c=a/100;
           d=a%100/10;
           e=a%100%10;
           System.out.println("百位"+c);
           System.out.println("十位"+d);
           System.out.println("个位"+e);
    }

}

5.输入大写字母，转换成对应的小写字母

import java.util.Scanner;


public class text2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        String a = input.next();
        char c = a.charAt(0);
        System.out.println((char)(c+32));
        }
    }

6.输入2个数，用三目运算符，输出较大数

import java.util.Scanner;


public class text2 {

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

}