第三次作业

1.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

package zy2;
import java.util.Scanner;
public class Test2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input = new Scanner(System.in);
        System.out.println("请输入商品单价");
        double dj = input.nextDouble();
        System.out.println("请输入商品数量");
        int sl = input.nextInt();
        double age = dj * sl;
        System.out.println(age);
        double dz = age * 0.8;
        System.out.println("抹零后" + dz);
        System.out.println("输入付款金额");
        int fq = input.nextInt();
        double zl = fq - dz;
        System.out.println(zl);
        
        


    }

}

2..输入一个三位数，求个位，十位和百位。

package zy2;
import java.util.Scanner;
public class Test2 {

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


    }

}

3.输入大写字母，转成对应的小写字母

package zy2;
import java.util.Scanner;
public class Test2 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input = new Scanner(System.in);

System.out.println("输入一个字符");
char c=input.next().charAt(0);
System.out.println("对应的小写字母是"+(char)(c+32));

}

}

 

4.输入2个数，用三目运算符，输出较大数

package zy2;
import java.util.Scanner;
public class Test2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入两个数字");
        double a=input.nextDouble();
        double b=input.nextDouble();
        System.out.println("较大的数字为"+(a>b?a:b));


    }

}

5.输入两个数交换

package zy2;
import java.util.Scanner;
public class Test2 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入a的值");
        double a=input.nextDouble();
        System.out.println("请输入b的值");
        double b=input.nextDouble();
        double c;
        c=a;
        a=b;
        b=c;
        System.out.println(a);
        System.out.println(b);

    }

}

6.输入两个数求平方和

package zy2;
import java.util.Scanner;
public class Test2 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input=new Scanner(System.in);
System.out.println("请输入a的值");
double a=input.nextDouble();
System.out.println("请输入b的值");
double b=input.nextDouble();
double c;
c=a*a+b*b;
System.out.println(c);

}

}