用Arduino板子，做rfid射频识别，编译的时候，出现了如下错误 15
做rfid射频识别，http://www.geek-workshop.com/thread-4719-1-1.html，用的是他的代码，编译的时候，出现了如下错误，ske...
做rfid射频识别，http://www.geek-workshop.com/thread-4719-1-1.html，用的是他的代码，编译的时候，出现了如下错误，sketch_may12a:39: error: redefinition of 'RFID rfid'
sketch_may12a:5: error: 'RFID rfid' previously declared here
sketch_may12a.ino: In function 'void setup()':
sketch_may12a:56: error: redefinition of 'void setup()'
sketch_may12a:6: error: 'void setup()' previously defined here
sketch_may12a.ino: In function 'void loop()':
sketch_may12a:63: error: redefinition of 'void loop()'
sketch_may12a:13: error: 'void loop()' previously defined here求指教 展开
sketch_may12a:5: error: 'RFID rfid' previously declared here
sketch_may12a.ino: In function 'void setup()':
sketch_may12a:56: error: redefinition of 'void setup()'
sketch_may12a:6: error: 'void setup()' previously defined here
sketch_may12a.ino: In function 'void loop()':
sketch_may12a:63: error: redefinition of 'void loop()'
sketch_may12a:13: error: 'void loop()' previously defined here求指教 展开
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