趣学Scratch 教孩子学编程 PDF下载

第1 章　基础知识............................................................... 1
1.1　简介 .....................................................................................................2
1.2　下载与安装 .........................................................................................2
1.3　操作界面 .............................................................................................4
1.3.1　舞台区 .........................................................................................4
1.3.2　角色区 .........................................................................................5
1.3.3　指令区 .........................................................................................5
1.3.4　脚本区 .........................................................................................6
1.4　综合应用 .............................................................................................8
1.5　第一个动画故事 ...............................................................................12
1.5.1　认识舞台 ...................................................................................12
1.5.2　角色设置 ...................................................................................13
1.5.3　位置设置 ...................................................................................14
1.5.4　小猫走路动画 ...........................................................................15
1.5.5　猫狗对话 ...................................................................................17
第2 章　程序设计入门..................................................... 20
2.1　顺序结构 ...........................................................................................21
2.2　循环结构 ...........................................................................................21
2.2.1　计数式循环 ..............................................................................21
2.2.2　条件式循环 ..............................................................................23
2.2.3　无限循环 ..................................................................................25
2.3　选择结构 ...........................................................................................28
2.3.1　单向选择结构 ..........................................................................28
2.3.2　双向选择结构 ..........................................................................30
2.4　变量 ...................................................................................................34
2.4.1　如何增加新变量 .......................................................................34
2.4.2　全局变量 ..................................................................................34
2.4.3　角色变量 ..................................................................................38
2.5　表达式 ...............................................................................................43
第3 章　编程技巧........................................................... 47
3.1　让角色移动 .......................................................................................48
3.1.1　方向与移动值 ..........................................................................48
3.1.2　设置x 和y 坐标 ......................................................................49
3.1.3　移到某个特定位置 ...................................................................49
3.2　限制角色移动范围 ...........................................................................51
3.2.1　利用x 和y 坐标 ......................................................................51
3.2.2　利用颜色（1） ........................................................................52
3.2.3　利用颜色（2） ........................................................................52
3.3　不断地移动 .......................................................................................53
3.3.1　在边缘的两端来回地移动 ......................................................53
3.3.2　在区域的两端来回地移动 ......................................................54
3.3.3　从一端消失再从另一端出现 ..................................................54
3.4　时间计算 ...........................................................................................55
3.4.1　计算游戏中花费的时间 ..........................................................55
3.4.2　倒数计时 ..................................................................................56
3.5　场景不断地往前移动 .......................................................................57
3.5.1　重复的场景 ..............................................................................57
3.5.2　连续的场景 ...............................................................................58
3.6　重力加速度 .......................................................................................60
3.6.1　自由落体 ..................................................................................60
3.6.2　抛物线 .......................................................................................61
第4 章　实战技能........................................................... 63
4.1　电流急急棒 .......................................................................................64
4.1.1　基本版 .......................................................................................64
4.1.2　多关版 .......................................................................................674.2　乒乓球 ...............................................................................................71
4.2.1　基本版 .......................................................................................71
4.2.2　打砖块 .......................................................................................73
4.3　迷宫寻宝 ...........................................................................................76
4.3.1　基本版 .......................................................................................76
4.3.2　寻宝版 .......................................................................................79
4.4　自由落体 ...........................................................................................85
4.4.1　打排球 .......................................................................................86
4.4.2　跳远 ...........................................................................................90
4.5　虫虫危机 ...........................................................................................94
4.6　青蛙过街 ...........................................................................................99
4.7　乐透彩开奖 .....................................................................................103
4.8　猴子吃香蕉 .....................................................................................106
4.9　翻牌 .................................................................................................112
4.10　星际大战 .......................................................................................122
4.11　射气球 ...........................................................................................135
4.12　贪食蛇 ...........................................................................................140
4.13　水果盘 ...........................................................................................144
第5 章　Arduino 互动科技项目....................................... 154
5.1　Arduino 简介 ..................................................................................155
5.2　安装S4A 步骤 ................................................................................156
5.2.1　安装软件程序 ........................................................................156
5.2.2　安装S4A 程序 .......................................................................162
5.3　使用S4A 操控LED 灯 ..................................................................163
5.3.1　硬件材料 ................................................................................164
5.3.2　连接方法 ................................................................................164
5.3.3　S4A 功能块 ............................................................................165
5.3.4　应用 ........................................................................................166
5.4　蜂鸣器 .............................................................................................167
5.4.1　硬件 ........................................................................................167
5.4.2　软件 ........................................................................................167
5.5　按钮 .................................................................................................168
5.5.1　硬件材料 ................................................................................168
5.5.2　硬件 ........................................................................................169
5.5.3　S4A 功能块 ............................................................................169
5.5.4　应用 ........................................................................................169
5.6　滑杆 .................................................................................................170
5.6.1　硬件材料 ................................................................................170
5.6.2　硬件 ........................................................................................171
5.6.3　S4A 功能块 ............................................................................171
5.6.4　应用 ........................................................................................171
5.7　光敏电阻 .........................................................................................173
5.7.1　硬件材料 ................................................................................173
5.7.2　硬件 ........................................................................................173
5.7.3　应用 ........................................................................................174
5.8　游戏杆 .............................................................................................175
5.8.1　硬件材料 ................................................................................175
5.8.2　硬件 ........................................................................................175
5.8.3　应用 ........................................................................................176
5.9　马达 .................................................................................................177
5.9.1　硬件材料 ................................................................................178
5.9.2　硬件 ........................................................................................178
5.9.3　S4A 功能块 ............................................................................179
5.9.4　应用 ........................................................................................179
5.10　无线传输 .......................................................................................179
5.10.1　硬件材料 ..............................................................................180
5.10.2　硬件 ......................................................................................181
5.11　机器车 ...........................................................................................181
5.11.1　硬件材料 ..............................................................................181
5.11.2　硬件 ......................................................................................182
5.11.3　使用箭头键控制机器车 ......................................................182
5.11.4　使用触须控制机器车 ..........................................................183
5.11.5　使用红外线控制机器车 ......................................................184