VIP会员

目录 · · · · · · 致谢....................................................................................................V 本书介绍...........................................................................................VII 第1章 准备开始.................................................................................1 什么是 Scratch ..................................................................................2 Scratch 编程环境 ..............................................................................3 试一试 1-1 ......................................................................................3 舞台 .........................................................................................................4 角色列表 .................................................................................................5 试一试 1-2 ......................................................................................5 试一试 1-3 ......................................................................................6 积木区 .....................................................................................................7 试一试 1-4 ......................................................................................8 脚本区 .....................................................................................................8 试一试 1-5 ......................................................................................9 试一试 1-6 ....................................................................................10 造型标签页 ...........................................................................................10 声音标签页 ...........................................................................................11 试一试 1-7 ....................................................................................11 试一试1-8 ....................................................................................12 背景标签页 ...........................................................................................12 角色信息 ...............................................................................................13 试一试 1-9 ....................................................................................13 工具栏 ...................................................................................................14 绘图编辑器 ......................................................................................15 设置图像的中心 ...................................................................................15 试一试 1-10 ..................................................................................16 设置透明色 ...........................................................................................16 制作第一个 Scratch 游戏 .................................................................17 第一步：准备背景 ...............................................................................18 第二步：加入反弹板和小球 ...............................................................18 第三步：让角色动起来 .......................................................................19 试一试 1-11 ..................................................................................20 第四步：添加声音更有趣 ...................................................................21 Scratch 积木一览 ............................................................................22 算术运算符和函数 ...........................................................................23 算术运算符 ...........................................................................................23 随机数 ...................................................................................................24 数学函数 ...............................................................................................25 本章小结 ..........................................................................................25 练习题 .............................................................................................25 第2章 动作和绘图...........................................................................29 使用动作模块的积木 ........................................................................29 绝对动作 ...............................................................................................30 试一试 2-1 ....................................................................................31 相对动作 ...............................................................................................32 试一试 2-2 ....................................................................................34 其他动作积木 .......................................................................................34 画笔模块和一个简单的画图程序 ......................................................35 试一试 2-3 ....................................................................................36 神奇的重复执行 ...............................................................................37 试一试 2-4 ....................................................................................37 旋转的正方形 .......................................................................................39 试一试 2-5 ....................................................................................39 试一试 2-6 ....................................................................................40 图章积木 ...............................................................................................40 Scratch 项目 ....................................................................................41 猫咪收集钱袋 .......................................................................................41 试一试 2-7 ....................................................................................41 接苹果游戏 ...........................................................................................45 关于被克隆的角色 ...........................................................................48 本章小结 ..........................................................................................49 练习题 .............................................................................................50 第3章 外观和声音...........................................................................53 外观模块 ..........................................................................................54 切换造型创建动画 ...............................................................................54 试一试 3-1 ....................................................................................55 试一试 3-2 ....................................................................................56 让角色思考并说话 ...............................................................................56 图形特效 ...............................................................................................57 角色大小和可视状态 ...........................................................................57 试一试 3-3 ....................................................................................58 角色间的图层 .......................................................................................58 声音模块 ..........................................................................................59 播放音频文件 .......................................................................................59 试一试 3-4 ....................................................................................59 弹奏鼓声和其他声音 ...........................................................................60 创作音乐 ...............................................................................................61 试一试 3-5 ....................................................................................62 试一试 3-6 ....................................................................................62 控制音量 ...............................................................................................62 设计 .......................................................................................................62 Scratch 项目 ....................................................................................63 在舞台上跳舞 .......................................................................................63 烟花效果 ...............................................................................................67 本章小结 ..........................................................................................69 练习题 .............................................................................................69 第4章 过程......................................................................................73 消息的广播和接收 ...........................................................................74 发送消息和接收消息 ...........................................................................75 使用广播机制协调多个角色 ...............................................................76 将大型程序分而治之 ........................................................................78 使用广播模拟过程 ...............................................................................80 创建自己的积木块 ...............................................................................81 给积木块添加参数 ...............................................................................83 试一试 4-1 ....................................................................................87 过程的嵌套 ...........................................................................................88 试一试 4-2 ....................................................................................90 分析问题的思维方式 ........................................................................90 自顶向下分析 .......................................................................................91 试一试 4-3 ....................................................................................93 自底向上分析 .......................................................................................94 本章小结 ..........................................................................................96 练习题 .............................................................................................96 第5章 变量......................................................................................99 Scratch 的数据类型 .......................................................................100 参数凹槽与积木形状 .........................................................................100 数据类型的自动转换 .........................................................................101 变量详解 ........................................................................................102 什么是变量？ .....................................................................................102 创建并使用变量 .................................................................................105 试一试 5-1 ..................................................................................108 变量的作用范围 .................................................................................108 修改变量的值 ......................................................................................111 绘制蜘蛛网 .........................................................................................112 绘制风车 .............................................................................................112 克隆体中的变量 .................................................................................113 试一试 5-2 ..................................................................................113 变量值显示器 .................................................................................116 在程序中使用变量值显示器 ............................................................117 欧姆定律模拟实验 .............................................................................117 串联电路模拟实验 .............................................................................119 试一试 5-3 ..................................................................................119 计算球体体积和表面积 ....................................................................121 试一试 5-4 ..................................................................................121 绘制玫瑰花瓣 .....................................................................................123 试一试 5-5 ..................................................................................123 葵花籽分布模型 .................................................................................125 试一试 5-6 ..................................................................................125 获得用户输入 ................................................................................127 读取数字 .............................................................................................127 试一试 5-7 ..................................................................................127 读取字符 .............................................................................................128 执行算术运算 .....................................................................................128 本章小结 ........................................................................................129 练习题 ...........................................................................................129 第6章 用逻辑做决定......................................................................133 比较操作符 ....................................................................................134 布尔表达式的求值 .............................................................................136 比较字符和字符串 .............................................................................136 分支结构 ........................................................................................138 如果…那么积木块 .............................................................................138 将变量作为标志 .................................................................................139 如果…那么否则积木 .........................................................................141 嵌套分支结构 .....................................................................................142 菜单驱动程序 .....................................................................................143 逻辑运算符 ....................................................................................144 且操作符（and） .................................................................................145 或操作符（or） ...................................................................................146 不成立操作符（not） ..........................................................................147 使用逻辑运算符检查数值范围 .........................................................148 Scratch 项目 ..................................................................................150 坐标猜测游戏 .....................................................................................150 试一试 6-1 ..................................................................................152 三角形分类游戏 .................................................................................152 试一试 6-2 ..................................................................................156 猫咪巡线 .............................................................................................156 试一试 6-3 ..................................................................................157 求解直线方程 .....................................................................................158 试一试 6-4 ..................................................................................162 其他应用程序 .....................................................................................162 本章小结 ........................................................................................162 练习题 ...........................................................................................162 第7章 深入循环.............................................................................165 循环结构 ........................................................................................166 重复执行直到积木 .............................................................................166 试一试 7-1 ..................................................................................168 将重复执行和如果…那么结合 .........................................................168 试一试 7-2 ..................................................................................169 停止积木 ........................................................................................170 试一试 7-3 ..................................................................................171 结束过程调用 .....................................................................................172 验证用户输入 .....................................................................................173 循环计数器 ....................................................................................174 密码验证 .............................................................................................174 灵活的循环计数 .................................................................................175 试一试 7-4 ..................................................................................175 循环的嵌套 ....................................................................................177 递归：调用自身的过程 ..................................................................179 试一试 7-5 ..................................................................................179 Scratch 项目 ..................................................................................181 模拟时钟 .............................................................................................181 试一试 7-6 ..................................................................................181 小鸟射击游戏 .....................................................................................183 试一试 7-7 ..................................................................................183 自由落体实验 .....................................................................................187 试一试 7-8 ..................................................................................187 试一试 7-9 ..................................................................................190 抛体运动模拟器 .................................................................................190 其他应用程序 .....................................................................................193 本章小结 ........................................................................................193 试一试 7-10 ................................................................................193 练习题 ...........................................................................................194 第8章 字符串处理.........................................................................197 字符串数据类型 .............................................................................198 特殊字符统计 .....................................................................................198 字符比较 .............................................................................................199 字符串操作示例 .............................................................................201 Igpay Atinlay .......................................................................................201 试一试 8-1 ..................................................................................201 单词修正 .............................................................................................203 试一试 8-2 ..................................................................................203 解密游戏 .............................................................................................205 试一试 8-3 ..................................................................................205 Scratch 项目 ..................................................................................208 射击游戏 .............................................................................................208 二进制数到十进制数转换 .................................................................211 试一试 8-4 ..................................................................................211 试一试 8-5 ..................................................................................212 试一试 8-6 ..................................................................................214 刽子手游戏 .........................................................................................214 试一试 8-7 ..................................................................................219 分数运算教学工具 .............................................................................220 试一试 8-8 ..................................................................................224 本章小结 ........................................................................................225 练习题 ...........................................................................................225 第9章 链表....................................................................................227 Scratch 的链表 ..............................................................................228 创建链表 .............................................................................................228 试一试 9-1 ..................................................................................230 链表的积木 .........................................................................................231 添加和删除 .........................................................................................231 插入和替换 .........................................................................................231 获得链表中的变量 .............................................................................232 包含积木 .............................................................................................233 边界检查 .............................................................................................233 试一试 9-2 ..................................................................................233 动态链表 ........................................................................................234 向链表填充用户输入 .........................................................................234 绘制柱状图 .........................................................................................236 数字链表 ........................................................................................239 寻找最值 .............................................................................................239 试一试 9-3 ..................................................................................239 试一试 9-4 ..................................................................................240 计算平均数 .........................................................................................240 搜索和排序 ....................................................................................241 线性搜索 .............................................................................................241 试一试 9-5 ..................................................................................241 频数统计 .............................................................................................242 试一试 9-6 ..................................................................................244 冒泡排序 .............................................................................................244 试一试 9-7 ..................................................................................246 寻找中位数 .........................................................................................247 Scratch 项目 ..................................................................................248 我是诗人 .............................................................................................248 四边形分类游戏 .................................................................................249 试一试 9-8 ..................................................................................249 试一试 9-9 ..................................................................................251 数学魔法师 .........................................................................................252 花的结构测验 .....................................................................................255 试一试 9-10 ................................................................................255 其他应用程序 .....................................................................................257 试一试 9-11 ................................................................................257 本章小结 ........................................................................................258 练习题 ...........................................................................................258 附录A 分享与合作..........................................................................261 创建 Scratch 账号 .........................................................................261 使用书包功能 ................................................................................264 创建项目 ........................................................................................266 创建新的项目 .....................................................................................266 项目再创作 .........................................................................................267 项目页 .................................................................................................268 分享项目 .............................................................................................268