gamemaker纯新手按b站教程做的，为什么运行不了？

1. https://www.google.com/search?q=+gamemaker+%E4%BB%85%E8%A2%AB%E5%BC%95%E7%94%A8%E4%B8%80%E6%AC%A1
2. https://manual-zh.yoyogames.com/Additional_Information/Errors/Syntax_Errors.htm
3. https://manual.yoyogames.com/Additional_Information/Errors/Syntax_Errors.htm
4. https://www.google.com/search?q=Variable%20%5Bval%5D%20only%20referenced%20once

答案

• https://www.reddit.com/r/gamemaker/comments/bd7r49/variable_one_referenced_once_error/
• https://www.reddit.com/r/gamemaker/comments/bkjutf/variable_xyz_only_referenced_once/

所以我猜是GameMaker把原本是语法警告的东西在后来的版本里改成了语法错误.

我好像看到了他提示的语法错误

o_player 事件： 步 位于第7行, 7 : 变量 up 仅被引用一次
o_player 事件： 步 位于第8行, 9 : 变量 down 仅被引用一次

好像出现了异常图片放不上去 我就把下面的输出结果复制给大家看吧

"/Library/Frameworks/Mono.framework/Versions/Current/Commands/mono"  /Users/Shared/GameMakerStudio2/Cache/runtimes/runtime-2022.3.0.496/bin/Igor.exe -j=8 -options="/tmp/GameMakerStudio2/GMS2TEMP/build.bff" -v -- Mac Run

FAILED: Run Program Complete
For the details of why this build failed, please review the whole log above and also see your Compile Errors window.

然后是我输入的东西

/// @description 在此处插入描述
// 你可以在此编辑器中写入代码
//get_input

var left       =keyboard_check(vk_left);
var right      =keyboard_check(vk_right);
var up         =keyboard_check(vk_up);
var down       =keyboard_check(vk_down);

//calc_movement

hsp +=(right-left)*walk_spd;

//apply_movement

x +=hsp;


//animation