编程时显示这个是怎么回事，求DX帮忙

只看该作者 · 2014-6-10 13:52

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Debug build of project `F:\PIClianxi\8gedengliang.mcp' started.
Preprocessor symbol `__DEBUG' is defined.
Tue Jun 10 13:49:06 2014
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Make: The target "F:\PIClianxi\8gedengliang.o" is out of date.
Executing: "D:\MCC18\bin\mcc18.exe" -p=18F4550 /i"D:\MCC18\h" "8gedengliang.c" -fo="8gedengliang.o" -D__DEBUG -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa-
F:\PIClianxi\8gedengliang.c:2:Error [1027] unable to locate '16c74.h'
F:\PIClianxi\8gedengliang.c:7:Error [1027] unable to locate 'input.c'
MPLAB C18 v3.02 (demo)
Copyright 1999-2005 Microchip Technology Inc.
Days remaining until demo becomes feature limited: 59
Halting build on first failure as requested.
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Debug build of project `F:\PIClianxi\8gedengliang.mcp' failed.
Preprocessor symbol `__DEBUG' is defined.
Tue Jun 10 13:49:07 2014
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BUILD FAILED

刚学PIC，很多地方不明白，刚安好软件但写程序总显示这个，求解什么意思，怎么解决，拜谢！