I m 编篡指挥线,配备一台自动机。
其中一个包括Im。
#ifndef F_CPU
#warning No CPU speed specified - assuming Axon is running at 16MHz
#define F_CPU 16000000
#endif
#if F_CPU != 16000000
#warning "AxonII normally runs at 16MHz but you have defined a different value"
#endif
When I run make I get:
In file included from main.c:7:
../webbotavrclib/sys/axon2.h:86:11: error: operator != has no left operand
第86条 F_CPU ! 我不敢肯定,为什么我会发现错误。
Such message can be produced, for example, for the following compilation:
$ gcc main.c -DF_CPU=
main.c:6:11: error: operator != has no left operand
注:F_CPU是定义的,但不是用什么!
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在我执政时,我发现以下错误:
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