Java第三次作业

1.输入两个数，交换后并输出

package practise;

import java.util.Scanner;

public class Test1 {

/**
* @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");
int a=input.nextInt();
System.out.println("请输入b的值");
int b=input.nextInt();
int c;
c=a;
a=b;
b=c;
System.out.println(a+","+b);
}

}

 

 

2.输入两个数，求平方和

package practise;

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");
int a=input.nextInt();
System.out.println("请输入b的值");
int b=input.nextInt();
int c;
c=a*a+b*b+2*a*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

package practise;

import java.util.Scanner;

public class Test3 {

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



}

}

 

4.输入一个三位数，求个位，十位和百位。

package practise;

import java.util.Scanner;

public class Test4 {

/**
* @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 g,s,b;
g=a%10;
s=a/10%10;
b=a/100;
System.out.println("个位是"+g+"十位是"+s+"百位是"+b);

}

}

 

5 .输入大写字母，转成对应的小写字母

package practise;

import java.util.Scanner;

public class Test5 {

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

}
}

 

 6.输入2个数，用三目运算符，输出较大数

package practise;

import java.util.Scanner;

public class Test6 {

/**
* @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");
int a=input.nextInt();
System.out.println("请输入b的值");
int b=input.nextInt();
System.out.println(a>b?a:b);
}

}