Java第三次

1.输入两个数进行互换

import java.util.Scanner;
public class h331 {

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

    }

}

 2.输入两个数进行平方求和

import java.util.Scanner;
public class h331 {

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

    }

}

 

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 h331 {

    /**
     * @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 a=input.nextDouble();
        System.out.println("请输入商品数量");
        int b=input.nextInt();
        double sum1,sum2;
        sum1=a*b;
        sum2=(int)(sum1*0.8);
        System.out.println("商品总价为"+sum1);
        System.out.println("商品活动价为"+sum2);
        System.out.println("请输入付款金额");
        double c=input.nextDouble();
        double l=(int)(c-sum2);
        System.out.println("应找零"+l);
        
        

    }

}

 

4.输入三位数，求各位十位百位

import java.util.Scanner;
public class h331 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个三位数");
        int a=input.nextInt();
        int g,s,b;
        g=a%10;
        s=a%100/10;
        b=a/100;
        System.out.println("三位数个位，十位，百位分别为"+g+s+b);
    }
}

 

5.输入大写字母，输出对应的小写字母

import java.util.Scanner;
public class h331 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入一个字母");
        char a=input.next().charAt(0);
        
        System.out.println("对应的小写字母为"+(char)(a+32));
    }
}

 

6.输入俩个数，用三目运算符，输出较大数

import java.util.Scanner;
public class h331 {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.println("请输入第一个数");
        int a=input.nextInt();
        System.out.println("请输入第二个数");
        int b=input.nextInt();
        int max=a>b?a:b;
        System.out.println("输出较大数为"+max);
    }
}