save code

solutions/lesson_gui_1.cpp

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+// =====================================================================
+// 第 1 课：GUI 你好窗口 —— 老师完整答案
+// 自己写完前不要偷看！卡住时再来对一下。
+// =====================================================================
+
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Box.H>
+
+int main() {
+    Fl_Window *window = new Fl_Window(400, 300, "抽卡世界");
+
+    Fl_Box *box = new Fl_Box(50, 100, 300, 100, "欢迎来到抽卡世界！");
+    box->labelsize(24);
+
+    window->end();
+    window->show();
+    return Fl::run();
+}

solutions/lesson_gui_2.cpp

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+// =====================================================================
+// 第 2 课：按钮与回调 —— 老师完整答案
+// =====================================================================
+
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Box.H>
+
+Fl_Box *result_box;
+
+void draw_callback(Fl_Widget *w, void *data) {
+    result_box->label("你点击了抽卡按钮！");
+    result_box->labelcolor(FL_RED);
+}
+
+int main() {
+    Fl_Window *window = new Fl_Window(400, 300, "抽卡世界 - 第2课");
+
+    Fl_Button *btn = new Fl_Button(130, 40, 140, 50, "抽一张！");
+    btn->labelsize(18);
+    btn->callback(draw_callback);
+
+    result_box = new Fl_Box(50, 130, 300, 100, "请点击按钮抽卡～");
+    result_box->labelsize(20);
+
+    window->end();
+    window->show();
+    return Fl::run();
+}

solutions/lesson_gui_3.cpp

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+// =====================================================================
+// 第 3 课：随机抽卡 —— 老师完整答案
+// =====================================================================
+
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Box.H>
+#include <cstdio>    // sprintf
+#include <cstdlib>   // rand, srand
+#include <ctime>     // time
+
+Fl_Box *result_box;
+Fl_Box *info_box;
+
+void draw_callback(Fl_Widget *w, void *data) {
+    int r = std::rand() % 100;
+
+    char info[50];
+    std::sprintf(info, "本次点数：%d", r);
+    info_box->label(info);
+
+    if (r < 70) {
+        result_box->label("☆ 普通卡 ☆");
+        result_box->labelcolor(fl_rgb_color(128, 128, 128));
+    } else if (r < 95) {
+        result_box->label("★ 稀有卡 ★");
+        result_box->labelcolor(FL_BLUE);
+    } else {
+        result_box->label("★★★ 超稀有卡！！ ★★★");
+        result_box->labelcolor(FL_RED);
+    }
+}
+
+int main() {
+    std::srand(std::time(nullptr));
+
+    Fl_Window *window = new Fl_Window(400, 350, "抽卡世界 - 第3课");
+
+    Fl_Button *btn = new Fl_Button(130, 30, 140, 50, "抽一张！");
+    btn->labelsize(18);
+    btn->callback(draw_callback);
+
+    result_box = new Fl_Box(50, 110, 300, 80, "点击按钮抽卡吧！");
+    result_box->labelsize(28);
+    result_box->labelfont(FL_BOLD);
+
+    info_box = new Fl_Box(50, 200, 300, 50, "");
+    info_box->labelsize(14);
+
+    window->end();
+    window->show();
+    return Fl::run();
+}

solutions/lesson_gui_4.cpp

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+// =====================================================================
+// 第 4 课：十连抽 —— 老师完整答案
+// =====================================================================
+
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Box.H>
+#include <cstdio>
+#include <cstdlib>
+#include <ctime>
+#include <string>
+
+Fl_Box *result_box;
+Fl_Box *info_box;
+
+void draw_one_callback(Fl_Widget *w, void *data) {
+    int r = std::rand() % 100;
+
+    char info[50];
+    std::sprintf(info, "单抽  |  点数：%d", r);
+    info_box->label(info);
+
+    if (r < 70) {
+        result_box->label("☆ 普通卡 ☆");
+        result_box->labelcolor(fl_rgb_color(128, 128, 128));
+    } else if (r < 95) {
+        result_box->label("★ 稀有卡 ★");
+        result_box->labelcolor(FL_BLUE);
+    } else {
+        result_box->label("★★★ 超稀有卡！！ ★★★");
+        result_box->labelcolor(FL_RED);
+    }
+    result_box->labelsize(28);
+}
+
+void draw_ten_callback(Fl_Widget *w, void *data) {
+    std::string all = "";
+    int rare_count = 0;
+    int super_count = 0;
+
+    for (int i = 1; i <= 10; i++) {
+        int r = std::rand() % 100;
+        all += "第" + std::to_string(i) + "抽：";
+
+        if (r < 70) {
+            all += "普通";
+        } else if (r < 95) {
+            all += "★稀有★";
+            rare_count++;
+        } else {
+            all += "★★★超稀有★★★";
+            super_count++;
+        }
+        all += "\n";
+    }
+
+    char stats[100];
+    std::sprintf(stats, "十连抽结果  |  稀有：%d  超稀有：%d",
+                 rare_count, super_count);
+    info_box->label(stats);
+    if (super_count > 0) {
+        info_box->labelcolor(FL_RED);
+    } else if (rare_count > 0) {
+        info_box->labelcolor(FL_BLUE);
+    } else {
+        info_box->labelcolor(fl_rgb_color(128, 128, 128));
+    }
+
+    result_box->labelsize(16);
+    result_box->label(all.c_str());
+    result_box->labelcolor(FL_BLACK);
+}
+
+int main() {
+    std::srand(std::time(nullptr));
+
+    Fl_Window *window = new Fl_Window(420, 480, "抽卡世界 - 第4课");
+
+    Fl_Button *btn1 = new Fl_Button(50, 20, 140, 50, "抽一张");
+    btn1->labelsize(18);
+    btn1->callback(draw_one_callback);
+
+    Fl_Button *btn10 = new Fl_Button(230, 20, 140, 50, "十连抽");
+    btn10->labelsize(18);
+    btn10->callback(draw_ten_callback);
+
+    info_box = new Fl_Box(30, 80, 360, 30, "");
+    info_box->labelsize(14);
+
+    result_box = new Fl_Box(30, 120, 360, 330, "点击按钮开始抽卡！");
+    result_box->labelsize(20);
+    result_box->align(FL_ALIGN_TOP | FL_ALIGN_LEFT);
+
+    window->end();
+    window->show();
+    return Fl::run();
+}

solutions/lesson_gui_5.cpp

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+// =====================================================================
+// 第 5 课：卡片名字与布局 —— 老师完整答案
+// =====================================================================
+
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Box.H>
+#include <cstdio>
+#include <cstdlib>
+#include <ctime>
+#include <string>
+
+std::string normal_cards[5] = {
+    "小火龙", "水跃鱼", "绿草龟", "小电鼠", "土拨仔"
+};
+std::string rare_cards[5] = {
+    "烈焰飞龙", "冰霜之狼", "暗影豹", "风暴鹰", "水晶鹿"
+};
+std::string super_cards[3] = {
+    "雷霆神龙", "凤凰王", "深海巨兽"
+};
+
+Fl_Box *result_box;
+Fl_Box *stats_box;
+
+void draw_one_callback(Fl_Widget *w, void *data) {
+    int r = std::rand() % 100;
+    std::string result = "";
+    std::string card_name = "";
+
+    if (r < 70) {
+        result = "☆ 普通卡 ☆";
+        card_name = normal_cards[std::rand() % 5];
+        result_box->labelcolor(fl_rgb_color(128, 128, 128));
+    } else if (r < 95) {
+        result = "★ 稀有卡 ★";
+        card_name = rare_cards[std::rand() % 5];
+        result_box->labelcolor(FL_BLUE);
+    } else {
+        result = "★★★ 超稀有卡！！ ★★★";
+        card_name = super_cards[std::rand() % 3];
+        result_box->labelcolor(FL_RED);
+    }
+
+    std::string display = result + "\n     " + card_name + "\n";
+    result_box->labelsize(24);
+    result_box->label(display.c_str());
+    stats_box->label("单抽模式");
+    stats_box->labelcolor(FL_BLACK);
+}
+
+void draw_ten_callback(Fl_Widget *w, void *data) {
+    std::string all = "";
+    int rare_count = 0;
+    int super_count = 0;
+
+    for (int i = 1; i <= 10; i++) {
+        int r = std::rand() % 100;
+        all += "第" + std::to_string(i) + "抽：";
+
+        if (r < 70) {
+            all += "普通  " + normal_cards[std::rand() % 5];
+        } else if (r < 95) {
+            all += "★稀有  " + rare_cards[std::rand() % 5];
+            rare_count++;
+        } else {
+            all += "★★★超稀有  " + super_cards[std::rand() % 3];
+            super_count++;
+        }
+        all += "\n";
+    }
+
+    result_box->labelsize(15);
+    result_box->label(all.c_str());
+    result_box->labelcolor(FL_BLACK);
+
+    char stats[100];
+    std::sprintf(stats, "十连：普通 %d | 稀有 %d | 超稀有 %d",
+                 10 - rare_count - super_count, rare_count, super_count);
+    stats_box->label(stats);
+    stats_box->labelcolor(super_count > 0 ? FL_RED : FL_BLUE);
+}
+
+int main() {
+    std::srand(std::time(nullptr));
+
+    Fl_Window *window = new Fl_Window(420, 520, "抽卡世界 - 第5课");
+
+    Fl_Button *btn1 = new Fl_Button(40, 15, 150, 45, "抽一张");
+    btn1->labelsize(18);
+    btn1->callback(draw_one_callback);
+
+    Fl_Button *btn10 = new Fl_Button(230, 15, 150, 45, "十连抽");
+    btn10->labelsize(18);
+    btn10->callback(draw_ten_callback);
+
+    result_box = new Fl_Box(20, 80, 380, 350, "点击按钮开始抽卡！");
+    result_box->labelsize(22);
+    result_box->align(FL_ALIGN_TOP | FL_ALIGN_LEFT);
+    result_box->box(FL_DOWN_BOX);
+
+    stats_box = new Fl_Box(20, 445, 380, 40, "等待抽卡...");
+    stats_box->labelsize(14);
+    stats_box->box(FL_FLAT_BOX);
+    stats_box->color(fl_rgb_color(230, 230, 230));
+
+    window->end();
+    window->show();
+    return Fl::run();
+}

solutions/lesson_gui_6.cpp

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+// =====================================================================
+// 第 6 课：完整抽卡游戏 —— 老师完整答案
+// =====================================================================
+
+#include <FL/Fl.H>
+#include <FL/Fl_Window.H>
+#include <FL/Fl_Button.H>
+#include <FL/Fl_Box.H>
+#include <cstdio>
+#include <cstdlib>
+#include <ctime>
+#include <string>
+
+// ===== 卡片数据 =====
+std::string normal_cards[5] = {
+    "小火龙", "水跃鱼", "绿草龟", "小电鼠", "土拨仔"
+};
+std::string rare_cards[5] = {
+    "烈焰飞龙", "冰霜之狼", "暗影豹", "风暴鹰", "水晶鹿"
+};
+std::string super_cards[3] = {
+    "雷霆神龙", "凤凰王", "深海巨兽"
+};
+
+// ===== 游戏状态 =====
+int coins = 500;
+int total_normal = 0;
+int total_rare = 0;
+int total_super = 0;
+
+// ===== 全局控件 =====
+Fl_Window *window;
+Fl_Box *result_box;
+Fl_Box *stats_box;
+Fl_Box *coins_box;
+
+void update_coins_display() {
+    char buf[50];
+    std::sprintf(buf, "金币：%d", coins);
+    coins_box->label(buf);
+    if (coins < 100) {
+        coins_box->labelcolor(FL_RED);
+    } else {
+        coins_box->labelcolor(fl_rgb_color(0, 100, 0));
+    }
+}
+
+void update_stats_display() {
+    char buf[100];
+    std::sprintf(buf, "累计：普通 %d  |  稀有 %d  |  超稀有 %d",
+                 total_normal, total_rare, total_super);
+    stats_box->label(buf);
+}
+
+// 抽一张卡：返回卡名，rare_level 引用参数表示稀有度（0/1/2）
+std::string get_card(int &rare_level) {
+    int r = std::rand() % 100;
+    if (r < 70) {
+        rare_level = 0;
+        total_normal++;
+        return normal_cards[std::rand() % 5];
+    } else if (r < 95) {
+        rare_level = 1;
+        total_rare++;
+        return rare_cards[std::rand() % 5];
+    } else {
+        rare_level = 2;
+        total_super++;
+        return super_cards[std::rand() % 3];
+    }
+}
+
+void draw_one_callback(Fl_Widget *w, void *data) {
+    if (coins < 10) {
+        result_box->label("金币不够！单抽需要 10 金币。\n点\"重置\"恢复金币。");
+        result_box->labelcolor(FL_RED);
+        result_box->labelsize(16);
+        return;
+    }
+
+    coins -= 10;
+    update_coins_display();
+
+    int level = 0;
+    std::string card = get_card(level);
+
+    std::string result;
+    if (level == 0) {
+        result = "☆ 普通卡 ☆\n     " + card;
+        result_box->labelcolor(fl_rgb_color(128, 128, 128));
+    } else if (level == 1) {
+        result = "★ 稀有卡 ★\n     " + card;
+        result_box->labelcolor(FL_BLUE);
+    } else {
+        result = "★★★ 超稀有卡！！ ★★★\n     " + card;
+        result_box->labelcolor(FL_RED);
+    }
+
+    result_box->labelsize(24);
+    result_box->label(result.c_str());
+    update_stats_display();
+}
+
+void draw_ten_callback(Fl_Widget *w, void *data) {
+    if (coins < 100) {
+        result_box->label("金币不够！十连抽需要 100 金币。\n点\"重置\"恢复金币。");
+        result_box->labelcolor(FL_RED);
+        result_box->labelsize(16);
+        return;
+    }
+
+    coins -= 100;
+    update_coins_display();
+
+    std::string all = "";
+    int ten_normal = 0, ten_rare = 0, ten_super = 0;
+
+    for (int i = 1; i <= 10; i++) {
+        int level = 0;
+        std::string card = get_card(level);
+
+        all += "第" + std::to_string(i) + "抽：";
+        if (level == 0) {
+            all += "普通  " + card;
+            ten_normal++;
+        } else if (level == 1) {
+            all += "★稀有  " + card;
+            ten_rare++;
+        } else {
+            all += "★★★超稀有  " + card;
+            ten_super++;
+        }
+        all += "\n";
+    }
+
+    char summary[80];
+    std::sprintf(summary, "\n--- 本次：普通%d  稀有%d  超稀有%d ---",
+                 ten_normal, ten_rare, ten_super);
+    all += summary;
+
+    result_box->labelsize(14);
+    result_box->label(all.c_str());
+    result_box->labelcolor(FL_BLACK);
+    update_stats_display();
+}
+
+void reset_callback(Fl_Widget *w, void *data) {
+    coins = 500;
+    total_normal = 0;
+    total_rare = 0;
+    total_super = 0;
+    update_coins_display();
+    update_stats_display();
+    result_box->labelsize(20);
+    result_box->label("游戏已重置！\n金币回到 500，统计清零。\n开始抽卡吧！");
+    result_box->labelcolor(FL_BLACK);
+}
+
+void quit_callback(Fl_Widget *w, void *data) {
+    window->hide();
+}
+
+int main() {
+    std::srand(std::time(nullptr));
+
+    window = new Fl_Window(440, 560, "抽卡大冒险");
+
+    Fl_Button *btn1 = new Fl_Button(30, 15, 150, 50, "单抽\n(10金币)");
+    btn1->labelsize(16);
+    btn1->callback(draw_one_callback);
+
+    Fl_Button *btn10 = new Fl_Button(260, 15, 150, 50, "十连抽\n(100金币)");
+    btn10->labelsize(16);
+    btn10->callback(draw_ten_callback);
+
+    coins_box = new Fl_Box(30, 75, 380, 30, "");
+    coins_box->labelsize(20);
+    coins_box->labelfont(FL_BOLD);
+    update_coins_display();
+
+    result_box = new Fl_Box(20, 115, 400, 270, "欢迎来到抽卡大冒险！\n点击上方按钮开始抽卡～");
+    result_box->labelsize(20);
+    result_box->align(FL_ALIGN_TOP | FL_ALIGN_LEFT);
+    result_box->box(FL_DOWN_BOX);
+
+    stats_box = new Fl_Box(20, 400, 400, 30, "");
+    stats_box->labelsize(14);
+    update_stats_display();
+
+    Fl_Button *btn_reset = new Fl_Button(100, 450, 100, 40, "重置");
+    btn_reset->callback(reset_callback);
+
+    Fl_Button *btn_quit = new Fl_Button(240, 450, 100, 40, "退出");
+    btn_quit->callback(quit_callback);
+
+    window->end();
+    window->show();
+    return Fl::run();
+}