keil 编译

我在不改变原有程序直接编译时出现一下错误：（用的KEIL7.09和8.08的版本）不知何故？

<h2>Output:</h2>
Build target 'Target 1'
compiling vvv.c...
assembling vvv.src...
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?C_STARTUP
MODULE: vvv.obj (VVV)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?C?SCDIV
MODULE: vvv.obj (VVV)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?C?IMUL
MODULE: vvv.obj (VVV)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL: ?C?SIDIV
MODULE: vvv.obj (VVV)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: ?C?SCDIV
MODULE: vvv.obj (VVV)
ADDRESS: 0054H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: ?C?IMUL
MODULE: vvv.obj (VVV)
ADDRESS: 0062H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: ?C?SCDIV
MODULE: vvv.obj (VVV)
ADDRESS: 0071H
*** WARNING L2: REFERENCE MADE T

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