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java - 质数Java

转载 作者:行者123 更新时间:2023-11-29 04:55:41 24 4
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这是家庭作业,我已经做了大部分,但我觉得我的素数生成器已关闭,因为当我运行它时,它只会将 1 和 3 的 Y 值增加 5,而不是 1 到 100 之间的所有其他素数;

这是作业题

It's Joen's Birthday and his friends have hidden his gift somewhere in his       house.

Joen begins at the origin: (0,0)

He has to follow 100 commands. The first being command 1, the second being command 2, etc.

Only one of the following can be applied at once.

-If the command number is both prime and odd, he must take 5 steps ahead (up)
-Otherwise if the command number is both prime and even, he must take 3 steps backwards (down)
-Otherwise if the command number is even, he must take one step to the right.
-Otherwise if the command number is odd, he must take one step to the left

The following rule can be applied in addition to another rule
-If the command number is divisible by 7, he must take the quotient number of steps down.

Using a coordinate system, at what point is the gift hidden? Create a program that shows the steps Joen takes to find his hidden gift.

这是我的代码

import java.util.*;

public class Party{
public static void main(String[] args) {

int counterCommand = 1;
int x = 0;
int y = 0;
int temp;
boolean isPrime=true;
while (counterCommand <= 100) {
int num=counterCommand;
for(int i=2;i<=num/2;i++){
temp=num%i;
if(temp==0){
isPrime=false;
break;}
}

if (isPrime==true){
if (counterCommand % 2 != 0){
y = y + 5;
}
else {
y = y - 3;
}
}
else{
if (counterCommand % 2 != 0){
x = x - 1;
}
else{
x = x + 1;
}

}
counterCommand = counterCommand + 1;
}
System.out.print(x + "," + y);
}
}

当我运行它时,Y 的值在任何不是 1 或 3(5、7、13 等)的 Prime 赔率下都没有增加,这是为什么?因为我知道我得到的 1,7 是不正确的

最佳答案

在我看来,您需要在循环内将 isPrime 重置为 true,目前您只设置一次,而不是针对数字中的每个迭代器。

因此,在找到第一个合数 (4) 后,您对素数的测试失败了。

关于java - 质数Java,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/33873384/

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