Java练习题...
答案:2 悬赏:60 手机版
解决时间 2021-11-12 12:35
- 提问者网友：自食苦果
- 2021-11-12 04:05
Java练习题...
最佳答案
- 五星知识达人网友：我住北渡口
- 2021-11-12 05:41
import java.util.Scanner;
public class test{
private static long fib(long num){
if (num==1||num==2) {
return 1;
}else {
return fib(num-1)+fib(num-2);
}
}
public static void main(String[] args) {
long sum = 0;
System.out.print("请输入兔子的成长月份：");
long mounth = new Scanner(System.in).nextLong();
while (mounth<=3) {
System.out.println("兔子的成长月份必须大于3！");
System.out.println(" ");
System.out.print("请输入兔子的成长月份：");
mounth = new Scanner(System.in).nextLong();
}
for (int i = 1; i <= mounth; i++) {
if (i%3 == 0) {
sum+=fib(i);
}
}
System.out.println(mounth+"个月后，兔子有："+sum+"只！");
}
}追问为什么我输入5个月才两只呢..
public class test{
private static long fib(long num){
if (num==1||num==2) {
return 1;
}else {
return fib(num-1)+fib(num-2);
}
}
public static void main(String[] args) {
long sum = 0;
System.out.print("请输入兔子的成长月份：");
long mounth = new Scanner(System.in).nextLong();
while (mounth<=3) {
System.out.println("兔子的成长月份必须大于3！");
System.out.println(" ");
System.out.print("请输入兔子的成长月份：");
mounth = new Scanner(System.in).nextLong();
}
for (int i = 1; i <= mounth; i++) {
if (i%3 == 0) {
sum+=fib(i);
}
}
System.out.println(mounth+"个月后，兔子有："+sum+"只！");
}
}追问为什么我输入5个月才两只呢..
全部回答
- 1楼网友：独行浪子会拥风
- 2021-11-12 05:55
importjava.util.ArrayList;importjava.util.HashMap;importjava.util.List;importjava.util.Map;publicclassClass{staticMapmap=newHashMap();staticMap>classMap=newHashMap>();staticListclassNameList=newArrayList();privateStringclassName;staticclassStudent{staticListstudentNameList=newArrayList();privateStringstudentName;publicstaticStringsign(Stringname){//报名方法Stringmsg="";StringclassName=map.get(name);msg=name+"说：我是【"+(className==null?"未知班级":className)+"】的"+name+"前来报到！";returnmsg;}publicStringgetStudentName(){returnstudentName;}publicvoidsetStudentName(StringstudentName){this.studentName=studentName;studentNameList.add(studentName);}publicstaticvoidmain(String[]args){ListclassAndStudentList1=newArrayList();ListclassAndStudentList2=newArrayList();ListclassAndStudentList3=newArrayList();Classclass1=newClass();class1.setClassName("一班");class1.setClassName("二班");class1.setClassName("三班");Studentstudent=newStudent();for(inti=1;i=4&&istudentNameList=classMap.get(className);System.out.println("--------------");for(inti=0;i
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