OOP最後兩次作業總結

王俊彬發表於2024-06-29

OPP最後兩次作業總結
前言
兩次題目集其實都是在前面的基礎上進行迭代，第一次作業說實話我沒花什麼時間，畢竟我從寫第一次PTA就是給電器使用兩個接點，我從拿到題目到達到及格分只用了半天時間，然後最後又花了點時間測試幾個樣例，拿到了82分。然後最後一次作業嘛，我幾乎是直接開擺了，總共有四個樣例，我只過了三個就沒管了，然後就直接交了，勉強拿到了25分，但是最後一看排名，沒想到居然是99名，也是有點出乎我的意料。這大概就是我這兩次作業是怎麼完成的了。

設計與分析
兩次作業都沒怎麼做設計方面的事情，就是把需求直接加到程式碼裡面，然後遇到問題就除錯幾下，最後除錯到樣例都過了就自己在那邊寫幾個樣例進行自測，最後寫的差不多了就交PTA上，沒設計這回事。

踩坑心得

在寫最後這次作業的時候我倒是踩了一些坑，首先就是我的線路連線方面的問題，我的線路連線函式設計比較混亂，導致從一個線路連線到另外一個線路比較難，其實大體的結構沒什麼問題，但是到後面出現一些新的需求的時候我就要反覆修改程式碼了，估計這是剛開始寫程式碼的時候幾乎從來沒有好好想過怎麼連線，就是直接上手開練的結果，導致最後就是反覆修改，改的自己都不知道怎麼執行的邏輯，然後在混亂的體系中嘗試理解，利用反覆的除錯來解決錯誤，最後雖然也能獲得一個正確的結構，但是說實話挺像在混日子的，
我的線路程式碼定義在四個類中,這是類設計的核心部分

Line(抽象電路類)
class Line {
public double resistance = 0;
public double inputVoltage = 0;
public double inVoltage = 0;
public double outVoltage = 0;
public double electricity = 0;
// public TreeMap <String, ArrayList > route = new TreeMap<>();
//public TreeMap <String, Double> PointVoltage = new TreeMap<>();
}

Circuit（串聯電路類）

class Circuits extends Line{
public String tick;
public Boolean mainState = false;
public ArrayList circuits = new ArrayList<>();
public double electricity = 0;
public boolean judgeShortCircle(){
boolean state = false;
if(this.resistance == 0){
state = true;
}
return state;
}
}

ParallelConnection(並聯電路類)

class ParallelConnection extends Line{
public double resistance = -1;
public String tick;
public ArrayList parallelConnection = new ArrayList<>();
}

ConnectionManager(計算線路屬性的函式)
class ConnectionManager {

public static double getComponentResistance(Component component, Map<Component, Device> devices, TreeMap<String, Circuits> circuits, TreeMap<String, ParallelConnection> parallelConnections) {
    double resistance = 0;
    if (component.type.equals("T")) {
        resistance = circuits.get(component.tick).resistance;
    } else if (component.type.equals("M")) {
        resistance = parallelConnections.get(component.tick).resistance;
    } else {
        resistance = devices.get(component).getResistance();
    }
    return resistance;
}

public static void chargeOpenParallelConnection(Map<Component, Device> devices, ParallelConnection parallelConnection, TreeMap<String, ParallelConnection> parallelConnections, TreeMap<String, Circuits> circuits) {
    for (Circuits c : parallelConnection.parallelConnection) {

// if(parallelConnection.inputVoltage == -1){
// parallelConnection.inputVoltage = 0;
// }
if (c.resistance == -1) {
c.inVoltage = parallelConnection.inVoltage;
chargeOpenCircuits(devices, c, parallelConnections, circuits);
} else {
c.inVoltage = parallelConnection.inVoltage;
c.inputVoltage = parallelConnection.inputVoltage;
chargeCircuits(devices, c, parallelConnections, circuits);
}
}
}

public static void chargeOpenCircuits(Map<Component, Device> devices, Circuits circuit, TreeMap<String, ParallelConnection> parallelConnections, TreeMap<String, Circuits> circuits) {
    double voltage = circuit.inVoltage;
    for (Component c : circuit.circuits) {
        if (c.type.equals("M")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                parallelConnections.get(c.tick).inVoltage = voltage;
                chargeOpenParallelConnection(devices, parallelConnections.get(c.tick), parallelConnections, circuits);
            } else {
                parallelConnections.get(c.tick).inVoltage = voltage;
                parallelConnections.get(c.tick).outVoltage = voltage;
                chargeOpenParallelConnection(devices, parallelConnections.get(c.tick), parallelConnections, circuits);
            }
        } else if (c.type.equals("T")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                circuits.get(c.tick).inVoltage = voltage;
                chargeOpenCircuits(devices, circuits.get(c.tick), parallelConnections, circuits);
            } else {
                circuits.get(c.tick).inVoltage = voltage;
                circuits.get(c.tick).outVoltage = voltage;
                chargeOpenCircuits(devices, circuits.get(c.tick), parallelConnections, circuits);
            }
        } else if (devices.get(c).ChargeCircuitsState) {
            continue;
        } else if (c.type.equals("F") || c.type.equals("L")) {
            devices.get(c).setInputVoltage(circuit.inputVoltage);
            circuit.inputVoltage = devices.get(c).getOutputVoltage();
            devices.get(c).setOutVoltage(voltage);
        }
        if (!c.type.equals("T") && !c.type.equals("M")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                devices.get(c).setInVoltage(voltage);
                devices.get(c).setChargeCircuitsState(true);
                break;
            } else {
                devices.get(c).setInVoltage(voltage);
                devices.get(c).setOutVoltage(voltage);
                devices.get(c).setChargeCircuitsState(true);
            }
        }//這裡重複了兩次
    }
}

public static void chargeCircuits(Map<Component, Device> devices, Circuits circuit, TreeMap<String, ParallelConnection> parallelConnections, TreeMap<String, Circuits> circuits) {
    double voltage = circuit.inVoltage;
    for (Component c : circuit.circuits) {
        if (c.type.equals("M")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                parallelConnections.get(c.tick).inVoltage = voltage;
                parallelConnections.get(c.tick).inputVoltage = 0;
                chargeOpenParallelConnection(devices, parallelConnections.get(c.tick), parallelConnections, circuits);
            } else {
                parallelConnections.get(c.tick).inVoltage = voltage;
                parallelConnections.get(c.tick).inputVoltage = circuit.inputVoltage * (parallelConnections.get(c.tick).resistance / circuit.resistance);
                voltage -= parallelConnections.get(c.tick).inputVoltage;
                parallelConnections.get(c.tick).outVoltage = voltage;
                chargeParallelConnection(devices, parallelConnections.get(c.tick), parallelConnections, circuits);
            }
        } else if (c.type.equals("T")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                circuits.get(c.tick).inVoltage = voltage;
                circuits.get(c.tick).inputVoltage = 0;
                chargeOpenCircuits(devices, circuits.get(c.tick), parallelConnections, circuits);
            } else {
                circuits.get(c.tick).inVoltage = voltage;
                circuits.get(c.tick).inputVoltage = circuit.inputVoltage * (circuits.get(c.tick).resistance / circuit.resistance);
                voltage -= circuits.get(c.tick).inputVoltage;
                circuits.get(c.tick).outVoltage = voltage;
                chargeCircuits(devices, circuits.get(c.tick), parallelConnections, circuits);
            }
        } else if (devices.get(c).ChargeCircuitsState) {
            continue;
        } else if (c.type.equals("F") || c.type.equals("L")) {
            devices.get(c).setInputVoltage(circuit.inputVoltage);
            circuit.inputVoltage = devices.get(c).getOutputVoltage();
            devices.get(c).setOutVoltage(voltage);
        } else {
            if(Math.abs(circuit.resistance + 1.0) < 0.0001){
                devices.get(c).setInputVoltage(0);
            }
            else {
                devices.get(c).setInputVoltage(circuit.inputVoltage * (devices.get(c).getResistance() / circuit.resistance));//注意這裡每個電路迴圈了兩遍
            }
        }
        if (!c.type.equals("T") && !c.type.equals("M")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                devices.get(c).setInVoltage(voltage);
                devices.get(c).setChargeCircuitsState(true);
                break;
            } else {
                devices.get(c).setInVoltage(voltage);
                voltage -= devices.get(c).inputVoltage;
                devices.get(c).setOutVoltage(voltage);
                devices.get(c).setChargeCircuitsState(true);
            }
        }//這裡重複了兩次
    }
    circuit.outVoltage = voltage;
}//為串聯電路充能

public static void chargeParallelConnection(Map<Component, Device> devices, ParallelConnection parallelConnection, TreeMap<String, ParallelConnection> parallelConnections, TreeMap<String, Circuits> circuits) {
    for (Circuits c : parallelConnection.parallelConnection) {

// if(c.resistance != -1) {
// if (parallelConnection.inputVoltage == -1) {
// parallelConnection.inputVoltage = 0;
// }//不知道有什麼用
c.inVoltage = parallelConnection.inVoltage;
if(c.resistance != -1) {
c.inputVoltage = parallelConnection.inputVoltage;
}
chargeCircuits(devices, c, parallelConnections, circuits);
// }
}
}//為並聯電路充能

public static void GenerateCurcuitsEletricity(Map<Component, Device> devices, Circuits circuit, TreeMap<String, ParallelConnection> parallelConnections, TreeMap<String, Circuits> circuits) {
    double eletricity = circuit.inputVoltage / circuit.resistance;
    for (Component c : circuit.circuits) {
        if (c.type.equals("M")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                parallelConnections.get(c.tick).electricity = -1;
                GenerateParallelEletricity(devices, parallelConnections.get(c.tick), parallelConnections, circuits);
            } else {
                GenerateParallelEletricity(devices, parallelConnections.get(c.tick), parallelConnections, circuits);
            }
        } else if (c.type.equals("T")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                circuits.get(c.tick).electricity = -1;
                GenerateCurcuitsEletricity(devices, circuits.get(c.tick), parallelConnections, circuits);
            } else {
                GenerateCurcuitsEletricity(devices, circuits.get(c.tick), parallelConnections, circuits);
            }
        } else if (devices.get(c).isGenerateState()) {
            continue;
        } else {
            devices.get(c).setInputVoltage(circuit.inputVoltage * (devices.get(c).getResistance() / circuit.resistance));//注意這裡每個電路迴圈了兩遍
        }
        if (!c.type.equals("T") && !c.type.equals("M")) {
            if (getComponentResistance(c, devices, circuits, parallelConnections) == -1) {
                devices.get(c).setGenerateState(true);
                break;
            } else {
                devices.get(c).setEletricity(eletricity);
                devices.get(c).setGenerateState(true);
            }
        }//這裡重複了兩次
    }
}
public static void GenerateParallelEletricity(Map<Component, Device> devices,ParallelConnection parallelConnection,TreeMap<String, ParallelConnection> parallelConnections,TreeMap<String, Circuits> circuits){
    for (Circuits c : parallelConnection.parallelConnection) {

// if (parallelConnection.electricity == -1) {
// parallelConnection.electricity = 0;
// }//不知道有什麼用
if(c.inputVoltage == -1) {
continue;
}
else if(c.inputVoltage == 0){
parallelConnection.electricity = 0;
break;
}
c.electricity = c.inputVoltage / c.resistance;
GenerateCurcuitsEletricity(devices, c, parallelConnections, circuits);
}
}
}

(在此附上類圖)

對本學期本門課程的改進建議及意見
我感覺今年的課程有點虎頭鼠尾了，剛開始上的各種物件導向原則都是必要的東西，但是到後面講的那些原則多數不能直接瞭解真正的用法，不使用也沒有太大關係，說實話，我這學期寫的程式碼確實多數是垃圾程式碼，老師並沒有真正教會我太多，倒是給了我幾個教訓，
1.那就是多數知識都是從小圈子裡面學習出來的，周圍人什麼樣自己常常就會什麼樣，就像PTA裡排名靠前的總是那一堆人，我嘛其實也不怎麼樣，雖然我給自己的要求比較低，每次PTA及格就行，但是就是發現就算這樣我也超過一半人了，也是很奇怪，我總覺得自己是比較開擺的人，這學期線代都沒考及格，但是這門課程確超過一半的人了，大概是我宿舍的其他三個人大部分PTA都是滿分把我逼上去的吧，。
2.原來學習成果確實不是和學習時間成正比，只是要養成一個習慣，每天學多久，玩多久，而且要以一種溝通的心態找到和自己一起學的人，這才算是有效的學習，自己一個人在圖書館學是造不出任何東西的，溝通始終是必要的，我的線代就是這麼掛的。
3.每次上完課記得回課，這樣才是有效率的學習，這學期我自己找了一個音樂學院的研究生教我美聲，我發現這才是主動學習，從小學到現在我所接受的教育都是被逼著去學的，我也是才明白有一門愛好的重要性，還有打遊戲確實有點浪費時間，畢竟現在的遊戲套路就那麼幾種，不同型別和風格的遊戲水平總是迭代上升的，那麼每隔兩個月玩七天貌似是更加合理的選擇。
4.然後就是刷影片的問題，現在的自媒體也總是在批評一些有的沒的東西，不管怎麼說都是套路化的，每個自媒體博主都像是一個小吃店，跟你講一些能夠讓你高興但卻是套路化的東西，看了多久都學不會做早餐，最多也只是供我們評價一下早餐的形狀和樣式，並不能教我多少東西，所以，除了聊天還是少刷影片吧

）前言：總結兩次題目集的題目的知識點、題量、難度等情況
（2）設計與分析：重點對題目的提交原始碼進行分析，可參考SourceMontor的生成報表內容以及PowerDesigner的相應類圖，要有相應的解釋和心得（做到有圖有真相），本次Blog必須分析題目集1~3的最後一題
（3）採坑心得：對原始碼的提交過程中出現的問題及心得進行總結，務必做到詳實，拿資料、原始碼及測試結果說話，切忌假大空
（4）改進建議：對相應題目的編碼改進給出自己的見解，做到可持續改進
（5）總結：對本階段兩次題目集的綜合性總結，學到了什麼，哪些地方需要進一步學習及研究
（6）最後一段，給出對本學期本門課程的改進建議及意見（難度大就不要提了）。

OOP最後兩次作業總結

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