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求助吧友，为什么错？ void setup() { // put your setup code here, to run once: } void loop() { // put your main code here, to run repeatedly: } Arduino:1.8.5 (Windows 10), 开发板："Arduino/Genuino Uno" In file included from C:\Users\luoqi\Desktop\arduino-1.8.5\hardware\arduino\avr\cores\arduino\WInterrupts.c:30:0: c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1529:25: error: unknown type name 'uint_farptr_t' extern size_t strlen_PF(uint_farptr_t src) __ATTR_CONST__; /* program memory can't change */ ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1545:26: error: unknown type name 'uint_farptr_t' extern size_t strnlen_PF(uint_farptr_t src, size_t len) __ATTR_CONST__; /* program memory can't change */ ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1560:36: error: unknown type name 'uint_farptr_t' extern void *memcpy_PF(void *dest, uint_farptr_t src, size_t len); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1575:36: error: unknown type name 'uint_farptr_t' extern char *strcpy_PF(char *dest, uint_farptr_t src); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1595:37: error: unknown type name 'uint_farptr_t' extern char *strncpy_PF(char *dest, uint_farptr_t src, size_t len); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1611:36: error: unknown type name 'uint_farptr_t' extern char *strcat_PF(char *dest, uint_farptr_t src); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1632:37: error: unknown type name 'uint_farptr_t' extern size_t strlcat_PF(char *dst, uint_farptr_t src, size_t siz); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1649:37: error: unknown type name 'uint_farptr_t' extern char *strncat_PF(char *dest, uint_farptr_t src, size_t len); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1665:38: error: unknown type name 'uint_farptr_t' extern int strcmp_PF(const char *s1, uint_farptr_t s2) __ATTR_PURE__; ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1682:39: error: unknown type name 'uint_farptr_t' extern int strncmp_PF(const char *s1, uint_farptr_t s2, size_t n) __ATTR_PURE__; ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1698:42: error: unknown type name 'uint_farptr_t' extern int strcasecmp_PF(const char *s1, uint_farptr_t s2) __ATTR_PURE__; ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1716:43: error: unknown type name 'uint_farptr_t' extern int strncasecmp_PF(const char *s1, uint_farptr_t s2, size_t n) __ATTR_PURE__; ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1732:40: error: unknown type name 'uint_farptr_t' extern char *strstr_PF(const char *s1, uint_farptr_t s2); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1744:37: error: unknown type name 'uint_farptr_t' extern size_t strlcpy_PF(char *dst, uint_farptr_t src, size_t siz); ^ c:\users\luoqi\desktop\arduino-1.8.5\hardware\tools\avr\avr\include\avr\pgmspace.h:1760:36: error: unknown type name 'uint_farptr_t' extern int memcmp_PF(const void *, uint_farptr_t, size_t) __ATTR_PURE__; ^ exit status 1 为开发板 Arduino/Genuino Uno 编译时出错。在文件 -> 首选项开启 “编译过程中显示详细输出”选项这份报告会包含更多信息。