[蓝桥杯国赛]常见错误

错误1

现象

C51编译警告“*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL”

WARNING L1: UNRESOLVED EXTERNAL SYMBOL

SYMBOL: ?C_START

MODULE: .STARTUP.obj (?C_STARTUP)

WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL

SYMBOL: ?C_START

MODULE: .STARTUP.obj (?C_STARTUP)

ADDRESS: 000DH

原因

①没把C文件添加到项目中！ ②还有可能是因为存在没有被调用的已经定义的函数