1.根据输入的1到12的数字，判断是春夏秋冬哪个季节，要求使用方法定义四个季节
package exercises5;
import java.util.Scanner;
/**
* 季节类
* @author 段海锋
*
*/
public class Season {
//春季方法
public void springtime() {
System.out.println("该季节为春季");
}
//夏季方法
public void summertime() {
System.out.println("该季节为夏季");
}
//秋季方法
public void autumn() {
System.out.println("该季节为秋季");
}
//冬季方法
public void wintertime() {
System.out.println("该季节为冬季");
}
public static void main(String[] args) {
Season sea = new Season();
System.out.print("请输入月份:");
Scanner input = new Scanner(System.in);
int month=input.nextInt();
if(month>=1 && month<=3) {
System.out.println();
sea.springtime();
}else if (month>=4 && month<=6) {
System.out.println();
sea.summertime();
}else if (month>=7 && month<=9) {
System.out.println();
sea.autumn();
}else if (month>=10 && month<=12) {
System.out.println();
sea.wintertime();
}
}
}
2.现有电视商品竞猜活动，活动的规则：随机出现一个商品名，用户猜测它的价格，如果在规定的次数内猜对，便可获得此商品。
package exercises7;
import java.util.Scanner;
public class QuessMachine {
String name;
double conjecture;
public void initial() {
int random=(int)(Math.random()*10);
switch (random) {
case 0:
case 1:
case 2:
case 3:
name = "公主电动车";
conjecture = 3000;
break;
case 4:
case 5:
case 6:
name = "海尔双开门冰箱";
conjecture = 12000;
break;
case 7:
case 8:
case 9:
name = "笔记本电脑";
conjecture = 5388;
break;
default:
break;
}
}
public void guess() {
System.out.println("\n请猜测'" +name +"'的价格:");
Scanner input = new Scanner(System.in);
double a = input.nextDouble();
boolean con = false;
for (int i = 1; i < 4; i++) {
if (a == conjecture) {
System.out.println("恭喜您,猜对了!");
con = true;
break;
} else if (a > conjecture) {
System.out.println("再小点!");
} else {
System.out.println("再大点!");
}
System.out.println("再猜一次吧:");
a = input.nextDouble();
}
if (!con) {
System.out.println("4次内没有猜对,下次努力吧!");
}
}
public static void main(String[] args) {
QuessMachine quess = new QuessMachine();
quess.initial();
quess.guess();
}
}
3.用带参的方法编写计算器实现：加，减，乘，除
package exercises6;
import java.util.Scanner;
/**
* 计算器类
* @author 段海锋
*
*/
public class Calculator {
int num1;//输入数字1
int num2;//输入数字2
double result;//结果
//加法方法
public double add(int num1,int num2) {
result=num1+num2;
return result;
}
//减法方法
public double minus(int num1,int num2) {
result=num1-num2;
return result;
}
//乘法方法
public double multiple(int num1,int num2) {
result=num1*num2;
return result;
}
public double divide(int num1,int num2) {
result=num1/num2;
return result;
}
public void operation() {
Scanner input = new Scanner(System.in);
System.out.println("请选择运算方法：1.(加法)2.(减法)3.(乘法)4.(除法)");
int select=input.nextInt();
switch(select) {
case 1:
add(num1, num2);
break;
case 2:
minus(num1, num2);
break;
case 3:
multiple(num1, num2);
break;
case 4:
divide(num1, num2);
}
}
public static void main(String[] args) {
Calculator calc = new Calculator();
Scanner input = new Scanner(System.in);
System.out.println("请输入第一个数:");
calc.num1=input.nextInt();
System.out.println("请输入第二个数:");
calc.num2=input.nextInt();
calc.operation();
System.out.println("运算结果为:"+calc.result);
}
}
4.一学员期末考试有三门课程的考试，即：JAVA,C#,SQL，编写方法计算每位学员的平均分
package exercises7;
import java.util.Scanner;
public class Student {
double avgscore;
double totalscore;
int javascore;
int cscore;
int sqlscore;
public double getavg() {
totalscore=javascore+cscore+sqlscore;
avgscore=totalscore/3.0;
return avgscore;
}
public static void main(String[] args) {
Student stu = new Student();
Scanner input = new Scanner(System.in);
double [] scoers = new double[1];
for (int i = 0; i < scoers.length; i++) {
System.out.println("请输入第"+(i+1)+"位同学的JAVA成绩:");
stu.javascore=input.nextInt();
System.out.println("请输入第"+(i+1)+"位同学的c#成绩:");
stu.cscore=input.nextInt();
System.out.println("请输入第"+(i+1)+"位同学的sql成绩:");
stu.sqlscore=input.nextInt();
}
System.out.println("平均成绩为:"+stu.getavg());
}
}
