把第一句改成如上,错误如下:LED.C(54): error C202: 'O7': undefined identifier
LED.C(57): error C202: 'O8': undefined identifier
LED.C(60): error C202: 'O9': undefined identifier
LED.C(63): error C202: 'F': undefined identifier
LED.C(69): error C202: 'S': undefined identifier
Target not created
按照错误提示改了,错误越改越多,我用Keil uVision3编译软件,不知道什么原因