因為上了鮑老師的課，每週都要做一次課堂練習。所以大三才想起來開C++的坑= =

程式碼是課上一個半小時寫出來的。難免有考慮不周的地方。如果有什麼問題，請各位不吝賜教~

首先解釋一下Life Game。開局一張棋盤，隨便放幾個棋子，然後每回合棋盤做一次更新，對棋盤的每個格子來說，看它周圍的9個鄰居在舊棋盤中的狀態，有兩個棋子則這個格子下回合是有棋的，有三個棋子則這個格子下回合狀態不變，其餘情況這個格子下回合沒有棋子。（鮑老師語：三活兩不變其餘死）

實現思路嘛，陣列開一張棋盤（注意邊界問題，可以多開兩行兩列作為邊界這樣判斷起來方便一些），之後每個回合，先另開一個棋盤儲存下舊棋盤，按舊棋盤的狀態去更新棋盤。

下面上程式碼

Life.h

#ifndef LIFE_H_INCLUDED
#define LIFE_H_INCLUDED

#define maxRow 20
#define maxCol 60

class Life {
public:
    void initialize();  // 建立棋盤
    void show();  // 列印棋盤
    void judge();  // 判斷並更新下一輪的情況

private:
    int board[maxRow + 2][maxCol + 2];  // 棋盤留出外面一圈作為邊界。0為無棋，1為有棋
};

#endif // LIFE_H_INCLUDED
 

Life.cpp

#include "Life.h"
#include <iostream>

using namespace std;

void Life::initialize()
{
    int i, j;
    bool flag = false;

    // 初始化棋盤，讓所有元素先等於0
    for (i = 0; i < maxRow + 1; i++) {
        for (j = 0; j < maxCol + 1; j++) {
            board[i][j] = 0;
        }
    }

    int tmpRow, tmpCol;
    cout << "請輸入初始棋子的座標，以x y形式輸入，以-1 -1結束" << endl;
    cin >> tmpRow >> tmpCol;

    // 判斷輸入合法性
    while (tmpRow != -1 && tmpCol != -1) {
        if (tmpRow >= 1 && tmpRow <= maxRow - 2) {
            if (tmpCol >= 1 && tmpCol <= maxCol - 2) {
                board[tmpRow][tmpCol] = 1;
                flag = true;
            }
            else {
                cout << "列數輸入錯誤。請重新輸入" << endl;
                flag = false;
            }
        }
        else {
            cout << "行數輸入錯誤。請重新輸入" << endl;
            flag = false;
        }
        if (flag) {
            cout << "繼續輸入或退出輸入" << endl;
            cin >> tmpRow >> tmpCol;
        }
        else {
            cin >> tmpRow >> tmpCol;
        }
    }
}

void Life::show()
{
    int i, j;
    cout << endl;
    for (i = 1; i < maxRow + 1; i++) {
        for (j = 1; j < maxCol + 1; j++) {
            if (board[i][j] == 1) {
                cout << "*";
            }
            else {
                cout << "-";
            }
        }
        cout << endl;
    }
    cout << endl;
}

void Life::judge()
{
    int i, j;
    int ii, jj;
    int newBoard[maxRow + 2][maxCol + 2];  // 用一個新的棋盤來存放更新後的情況，之後將新棋盤賦值給舊棋盤
    int tmpCount;  // 計算鄰居數

    for (i = 1; i < maxRow + 1; i++) {
        for (j = 1; j < maxCol + 1; j++) {
            newBoard[i][j] = 0;
        }
    }

    for (i = 1; i < maxRow + 1; i++) {
        for (j = 1; j < maxCol + 1; j++) {
            tmpCount = 0;

            // 計算鄰居數
            for (ii = i - 1; ii <= i + 1; ii++) {
                for (jj = j - 1; jj <= j + 1; jj++) {
                    if (board[ii][jj] == 1) {
                        tmpCount++;
                    }
                }
            }

            tmpCount -= board[i][j];  // 去掉自己

            // 計算棋子生死
            if (tmpCount == 2) {
                newBoard[i][j] = board[i][j];
            }
            else if (tmpCount == 3) {
                newBoard[i][j] = 1;
            }
            else {
                newBoard[i][j] = 0;
            }
        }
    }

    // 將新棋盤賦給舊棋盤
    for (i = 1; i < maxRow + 1; i++) {
        for (j = 1; j < maxCol + 1; j++) {
            board[i][j] = newBoard[i][j];
        }
    }
}
 

main.cpp

#include "Life.h"
#include "iostream"

using namespace std;

int main(void)
{
    Life l;
    char tmp;
    cout << "Welcome to Li Qingquan's game of life." << endl;
    cout << "This game uses a grid of size 20 by 60 in witch" << endl;
    cout << "each cell can either be occupied by an organism or not." << endl;
    cout << "according to the number of neighbouring cells which are alive." << endl;
    cout << "List the coordinates for living cells." << endl;
    l.initialize();
    l.show();
    cout << "請輸入是否繼續（Y/N）？" << endl;
    cin >> tmp;
    while (tmp != 'Y' && tmp != 'y' && tmp != 'N' && tmp != 'n') {
        cout << "輸入錯誤，請重新輸入（Y/N）" << endl;
        cin >> tmp;
    }
    while (tmp == 'Y' || tmp == 'y') {
        l.judge();
        l.show();
        cout << "請輸入是否繼續（Y/N）？" << endl;
        cin >> tmp;
        while (tmp != 'Y' && tmp != 'y' && tmp != 'N' && tmp != 'n') {
            cout << "輸入錯誤，請重新輸入（Y/N）" << endl;
            cin >> tmp;
        }
    }
    cout << "感謝試玩！" << endl;
    return 0;
}

執行結果就是這樣了

（這個圖片是怎麼回事，擠扁了好可憐= =）