C++初心者が荷物運びゲームをつくってみた

main.cpp

/*
 平山尚『ゲームプログラマになる前に覚えておきたい技術』より

 お題：荷物運びゲームを2時間以内につくる
*/

#include<iostream>
using namespace std;

char screen[5][8] = {
    {'#', '#', '#', '#', '#', '#', '#', '#',},
    {'#', ' ', '.', '.', ' ', 'p', ' ', '#',},
    {'#', ' ', 'o', 'o', ' ', ' ', ' ', '#',},
    {'#', ' ', ' ', ' ', ' ', ' ', ' ', '#',},
    {'#', '#', '#', '#', '#', '#', '#', '#',},
};

char input;
int  x, y;
bool cleared = false;

void getInput() {
    cin >> input;
}

void setPosition() {
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 8; j++) {
            if (screen[i][j] == 'p' || screen[i][j] == 'P') {
                x = j;
                y = i;
            }
        }
    }
}

bool isGoalPoint(int rx, int ry) {
    if ((ry == 1 && rx == 2) || (ry == 1 && rx == 3)) {
        return true;
    }
    return false;
}

void setCleared() {
    if (screen[1][2] == 'O' && screen[1][3] == 'O') {
        cleared = true;
    }
}

void move(int rx, int ry, char c) {
    if (c == '#') {
        return;
    }
    else if (c == ' ') {
        screen[ry][rx] = 'p';
        if (screen[y][x] == 'P') {
            screen[y][x] = '.';
        }
        else {
            screen[y][x] = ' ';
        }
    }
    else if (c == '.') {
        screen[ry][rx] = 'P';
        if (screen[y][x] == 'P') {
            screen[y][x] = '.';
        }
        else {
            screen[y][x] = ' ';
        }
    }
    else if (c == 'o' || c == 'O') {
        int rxx, ryy;
        if (input == 'a') {
            rxx = rx - 1;
            ryy = ry;
        }
        else if (input == 's') {
            rxx = rx + 1;
            ryy = ry;
        }
        else if (input == 'w') {
            rxx = rx;
            ryy = ry - 1;
        }
        else if (input == 'z') {
            rxx = rx;
            ryy = ry + 1;
        }

        if (screen[ryy][rxx] == '#' || screen[ryy][rxx] == 'o') {
            return;
        }
        else if (screen[ryy][rxx] == ' ') {
            screen[ryy][rxx] = 'o';
            if (isGoalPoint(rx, ry)) {
                screen[ry][rx] = 'P';
                if (screen[y][x] == 'P') {
                    screen[y][x] = '.';
                }
                else {
                    screen[y][x] = ' ';
                }
            }
            else {
                screen[ry][rx]   = 'p';
                if (screen[y][x] == 'P') {
                    screen[y][x] = '.';
                }
                else {
                    screen[y][x] = ' ';
                }
            }
        }
        else if (screen[ryy][rxx] == '.') {
            screen[ryy][rxx] = 'O';
            if (isGoalPoint(rx, ry)) {
                screen[ry][rx] = 'P';
                if (screen[y][x] == 'P') {
                    screen[y][x] = '.';
                }
                else {
                    screen[y][x] = ' ';
                }
            }
            else {
                screen[ry][rx]   = 'p';
                if (screen[y][x] == 'P') {
                    screen[y][x] = '.';
                }
                else {
                    screen[y][x] = ' ';
                }
            }
        }
        else if (screen[ryy][rxx] == ' ') {
            screen[ryy][rxx] = 'o';
        }
    }
}

void updateGame() {
    int rx, ry = 0;
    char c;
    setPosition();
    if (input == 'a') {
        rx = x - 1;
        ry = y;
        c  = screen[ry][rx];
        move(rx, ry, c);
    }
    else if (input == 's') {
        rx = x + 1;
        ry = y;
        c  = screen[ry][rx];
        move(rx, ry, c);
    }
    else if (input == 'w') {
        rx = x;
        ry = y - 1;
        c  = screen[ry][rx];
        move(rx, ry, c);
    }
    else if (input == 'z') {
        rx = x;
        ry = y + 1;
        c  = screen[ry][rx];
        move(rx, ry, c);
    }
    else {
        return;
    }
    setCleared();
}

void draw() {
    for (int i = 0; i < 5; i++) {
        for (int j = 0; j < 8; j++) {
            cout << screen[i][j];
        }
        cout << endl;
    }
    if (cleared) {
        cout << "Congratulation's! you won." << endl;
    }
    else {
        cout << "a:left s:right w:up z:down. command?" << endl;
    }
}

int main() {
    draw();
    while (true) {
        if (cleared) continue;
        getInput();
        updateGame();
        draw();
    }
}