斐波纳契序列问题 [英] Fibonacci sequence problems
问题描述
我编写了下面的代码斐波那契序列我遇到的问题是，当我针对我的JUnit测试代码运行它时，只解决了一个问题。我会在下面给你看。
这是我的光荣代码.....不是真的。
我是什么尝试过：
I have written code below which does the Fibonacci Sequence the problem I am having is that when I run it against my JUnit Test code only one problem is resolved. I will show you below.
This is my glorious code.....not really.
What I have tried:
import java.util.ArrayList;
public class ResitCode {
public int Fib_No(int position) {
position = 10;
ArrayList<Integer> a = new ArrayList<Integer>();
a.add(0);
a.add(1);
System.out.println(position);
for (int i = 1; i <= position; ++i) {
System.out.println(a.get(0) + " ");
int sumofBoth = a.get(0) + a.get(1);
int a1 = a.get(0);
int a2 = a.get(1);
a1 = a2;
a2 = sumofBoth;
}
return 0 ;
}
现在这是我的单元测试代码
Now this is my Unit Test code
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
class ResitCodeTest {
public static ResitCode test;
@BeforeAll
static void setUpBeforeClass() throws Exception {
test = new ResitCode();
}
@ParameterizedTest
@DisplayName("Testing Fib_No")
@CsvSource({
"1,0",
"2,1",
"3,1",
"4,2",
"8,13",
"14,233"
})
void testFib_No(int pos, int fibno) {
assertEquals(fibno,test.Fib_No(pos));
}
当我针对此运行它时，只有一个问题得到解决，如果有人能告诉我我做错了什么非常感谢。
When I run it against this only one issue is resolved, if anybody can tell me what i am doing wrong it will be greatly appreciated.
推荐答案
当我针对它运行时这只有一个问题得到解决，如果有人能告诉我我做错了什么，我将不胜感激。
When I run it against this only one issue is resolved, if anybody can tell me what i am doing wrong it will be greatly appreciated.
关于任何事情是错误的。
About anything is wrong.
import java.util.ArrayList;
public class ResitCode {
public int Fib_No(int position) { // here you receive the position you want
position = 10; // and here you kill it !
ArrayList<Integer> a = new ArrayList<Integer>();
a.add(0);
a.add(1);
System.out.println(position);
for (int i = 1; i <= position; ++i) {
System.out.println(a.get(0) + " ");
int sumofBoth = a.get(0) + a.get(1);
int a1 = a.get(0);
int a2 = a.get(1);
a1 = a2;
a2 = sumofBoth;
}
return 0 ; // Whatever you do, the result is 0 !
}
这个代码中只有2个问题，关于其他任何错误。
单位擅长检查是否你的代码按预期工作，它不能帮助你修复代码。
你需要学习的工具是调试器，它会告诉你你的代码到底在做什么。
-----
你的代码没有你想象的那样，或者你不明白为什么！
有一个几乎通用的解决方案：逐步在调试器上运行代码，检查变量。
调试器在这里向您展示您的代码正在做什么，您的任务是与它应该做什么进行比较做。
调试器中没有魔法，它不知道你的代码应该做什么，它没有找到错误，只是通过向你展示发生了什么来帮助你。当代码没有达到预期的效果时，你就接近了一个错误。
要查看你的代码在做什么：只需设置断点并查看代码是否正常运行，调试器允许你执行第1行第1行，并在执行时检查变量。
调试器 - 维基百科，免费的百科全书 [ ^ ]
掌握调试Visual Studio 2010 - 初学者指南 [ ^ ]
使用Visual Studio 2010进行基本调试 - YouTube [ ^ ]
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/jdb.html [ ^ ]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html [ ^ ]
调试器只是向您展示您的代码正在做什么，您的任务是与它应该做什么进行比较。
[更新]
and those are only 2 problems in this code, about anything else is wrong.
Units are good at checking if your code works as expected, it is not good at helping you fixing the code.
The tool you need to learn is the debugger, it will show you what your code is really doing.
-----
Your code do not behave the way you expect, or you don't understand why !
There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
http://docs.oracle.com/javase/7/docs/technotes/tools/windows/jdb.html[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]
The debugger is here to only show you what your code is doing and your task is to compare with what it should do.
[Update]
@CsvSource({
"1,0",
"2,1",
"3,1",
"4,2",
"8,13",
"14,233"
})
即使您的测试单元看起来错误f（0）= 0，f（1）= 1
Fibonacci编号 - 维基百科 [ ^ ]
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