1.Warning280:’i’:unreferenced local variable说明局部变量i在函数中未作任何的存取操作解决方法消除函数中i变量的宣告2Warning206:’Music3’:missing function-prototype说明Music3()函数未作宣告或未作外部宣告所以无法给其他函数调用解决方法将叙述void Music3(void)写在程序的最前端作宣告如果是其他文件的函数则要写成extern void Music3(void),即作外部宣告3Compling:C:\8051\MANN.CError:318:can’t open file‘beep.h’说明在编译C:\8051\MANN.C程序过程中由于main.c用了指令#include“beep.h”,但却找不到所致解决方法编写一个beep.h的包含档并存入到c:\8051的工作目录中4Compling:C:\8051\LED.CError237:’LedOn’:function already has a body说明LedOn()函数名称重复定义即有两个以上一样的函数名称解决方法修正其中的一个函数名称使得函数名称都是独立的5***WARNING16:UNCALLED SEGMENT,IGNORED FOR OVERLAY PROCESS SEGMENT:?PR?_DELAYX1MS?DELAY说明DelayX1ms()函数未被其它函数调用也会占用程序记忆体空间解决方法去掉DelayX1ms()函数或利用条件编译#if…..#endif,可保留该函数并不编译6***WARNING6:XDATA SPACE MEMORY OVERLAPFROM:0025HTO:0025H说明外部资料ROM的0025H重复定义地址解决方法外部资料ROM的定义如下Pdata unsigned char XFR_ADC_at_0x25其中XFR_ADC变量的名称为0x25,请检查是否有其它的变量名称也是定义在0x25处并修正它7WARNING206:’DelayX1ms’:missing function-prototypeC:\8051\INPUT.CError267:’DelayX1ms‘:requires ANSI-style prototype C:\8051\INPUT.C说明程序中有调用DelayX1ms函数但该函数没定义即未编写程序内容或函数已定义但未作宣告解决方法编写DelayX1ms的内容编写完后也要作宣告或作外部宣告可在delay.h的包含档宣告成外部以便其它函数调用8***WARNING1:UNRESOLVED EXTERNAL SYMBOLSYMBOL:MUSIC3MODULE:C:\8051\MUSIC.OBJ(MUSIC)***WARNING2:REFERENCE MADE TO UNRESOLVED EXTERNALSYMBOL:MUSIC3MODULE:C:\8051\MUSIC.OBJ(MUSIC)ADDRESS:0018H说明程序中有调用MUSIC函数但未将该函数的含扩档C加入到工程档Prj作编译和连接解决方法设MUSIC3函数在MUSIC C里将MUSIC C添加到工程文件中去9***ERROR107:ADDESS SPACE OVERFLOWSPACE:DATASEGMENT:_DATA_GOUP_LENGTH:0018H***ERROR118:REFERENCE MADE TO ERRONEOUS EXTERNALSYMBOL:VOLUMEMODULE:C:\8051\OSDM.OBJ(OSDM)ADDRESS:4036H说明data存储空间的地址范围为0~0x7f,当公用变量数目和函数里的局部变量如果存储模式设为SMALL则局部变量先使用工作寄存器R2~R7作暂存当存储器不够用时则会以data型别的空间作暂存的个数超过0x7f时就会出现地址不够的现象解决方法将以data型别定义的公共变量修改为idata型别的定义Ambiguous operators need parentheses 不明确的运算需要用括号括起Ambiguous symbol``xxx``不明确的符号Argument list syntax error参数表语法错误Array bounds missing丢失数组界限符Array size toolarge数组尺寸太大Bad character in paramenters参数中有不适当的字符Bad file name format in include directive 包含命令中文件名格式不正确Bad ifdef directive synatax编译预处理ifdef有语法错Bad undef directive syntax编译预处理undef有语法错Bit field too large位字段太长Call of non-function调用未定义的函数Call to function with no prototype调用函数时没有函数的说明Cannot modify a const object不允许修改常量对象Case outside of switch漏掉了case语句Case syntax errorCase语法错误Code has no effect代码不可述不可能执行到Compound statement missing{分程序漏掉"{"Conflicting type modifiers不明确的类型说明符Constant expression required要求常量表达式Constant out of range in comparison 在比较中常量超出范围Conversion may lose significant digits 转换时会丢失意义的数字Conversion of near pointer not allowed 不允许转换近指针Could not find file``xxx``找不到XXX文件Declaration missing;说明缺少"；"Declaration syntax error说明中出现语法错误Default outside of switchDefault出现在switch语句之外Define directive needs an identifier 定义编译预处理需要标识符Division by zero用零作除数Do statement must have whileDo-while语句中缺少while部分Enum syntax error枚举类型语法错误Enumeration constant syntax error 枚举常数语法错误Error directive:xxx错误的编译预处理命令Error writing output file写输出文件错误Expression syntax error表达式语法错误Extra parameter in call调用时出现多余错误File name too long文件名太长Function call missing)函数调用缺少右括号Fuction definition out of place函数定义位置错误Fuction should return a value函数必需返回一个值Goto statement missing labelGoto语句没有标号Hexadecimal or octal constant too large 16进制或8进制常数太大Illegal character``x``非法字符xIllegal initialization非法的初始化Illegal octal digit非法的8进制数字Illegal pointer subtraction非法的指针相减Illegal structure operation非法的结构体操作Illegal use of floating point非法的浮点运算Illegal use of pointer指针使用非法Improper use of a typedefsymbol类型定义符号使用不恰当In-line assembly not allowed不允许使用行间汇编Incompatible storage class存储类别不相容Incompatible type conversion不相容的类型转换Incorrect number format错误的数据格式Incorrect use of defaultDefault使用不当Invalid indirection无效的间接运算Invalid pointer addition指针相加无效Irreducible expression tree无法执行的表达式运算Lvalue required需要逻辑值0或非0值Macro argument syntax error宏参数语法错误Macro expansion too long宏的扩展以后太长Mismatched number of parameters in definition 定义中参数个数不匹配Misplaced break此处不应出现break语句Misplaced continue此处不应出现continue语句Misplaced decimal point此处不应出现小数点Misplaced elif directive不应编译预处理elifMisplaced else此处不应出现elseMisplaced else directive此处不应出现编译预处理elseMisplaced endif directive此处不应出现编译预处理endifMust be addressable必须是可以编址的Must take address of memory location 必须存储定位的地址No declaration for function``xxx``没有函数xxx的说明No stack缺少堆栈No type information没有类型信息Non-portable pointer assignment不可移动的指针（地址常数）赋值Non-portable pointer comparison不可移动的指针（地址常数）比较Non-portable pointer conversion不可移动的指针（地址常数）转换Not a valid expression format type不合法的表达式格式Not an allowed type不允许使用的类型Numeric constant too large数值常太大Out of memory内存不够用Parameter``xxx``is never used能数xxx没有用到Pointer required on left side of->符号->的左边必须是指针Possible use of``xxx``before definition 在定义之前就使用了xxx（警告）Possibly incorrect assignment赋值可能不正确Redeclaration of``xxx``重复定义了xxxRedefinition of``xxx``is not identical xxx的两次定义不一致Register allocation failure寄存器定址失败Repeat count needs an lvalue重复计数需要逻辑值Size of structure or array not known结构体或数给大小不确定Statement missing;语句后缺少"；"Structure or union syntax error结构体或联合体语法错误Structure size too large结构体尺寸太大Sub scripting missing]下标缺少右方括号Superfluous&with function or array 函数或数组中有多余的"&"Suspicious pointer conversion可疑的指针转换Symbol limit exceeded符号超限Too few parameters in call函数调用时的实参少于函数的参数不Too many default casesDefault太多(switch语句中一个)Too many error or warning messages 错误或警告信息太多Too many type in declaration说明中类型太多Too much auto memory in function 函数用到的局部存储太多Too much global data defined in file 文件中全局数据太多Two consecutive dots两个连续的句点Type mismatch in parameter xxx参数xxx类型不匹配Type mismatch in redeclaration of``xxx``xxx重定义的类型不匹配Unable to create output file``xxx``无法建立输出文件xxxUnable to open include file``xxx``无法打开被包含的文件xxxUnable to open input file``xxx``无法打开输入文件xxxUndefined label``xxx``没有定义的标号xxxUndefined structure``xxx``没有定义的结构xxxUndefined symbol``xxx``没有定义的符号xxxUnexpected end of file in comment started on line xxx 从xxx行开始的注解尚未结束文件不能结束Unexpected end of file in conditional started on line xxx 从xxx开始的条件语句尚未结束文件不能结束Unknown assemble instruction未知的汇编结构Unknown option未知的操作Unknown preprocessor directive:``xxx``不认识的预处理命令xxxUnreachable code无路可达的代码Unterminated string or character constant字符串缺少引号User break用户强行中断了程序Void functions may not return a valueVoid类型的函数不应有返回值Wrong number of arguments调用函数的参数数目错``xxx``not an argumentxxx不是参数``xxx``not part of structurexxx不是结构体的一部分xxx statement missing(xxx语句缺少左括号xxx statement missing)xxx语句缺少右括号xxx statement missing;xxx缺少分号xxx``declared but never used说明了xxx但没有使用xxx``is assigned a value which is never used 给xxx赋了值但未用过Zero length structure结构体的长度为零1.第一种错误信息***WARNING L15:MULTIPLE CALL TO SEGMENTSEGMENT:?PR?_WRITE_GMVLX1_REG?D_GMVLX1CALLER1:?PR?VSYNC_INTERRUPT?MAINCALLER2:?C_C51STARTUP***WARNING L15:MULTIPLE CALL TO SEGMENTSEGMENT:?PR?_SPI_SEND_WORD?D_SPICALLER1:?PR?VSYNC_INTERRUPT?MAINCALLER2:?C_C51STARTUP***WARNING L15:MULTIPLE CALL TO SEGMENTSEGMENT:?PR?SPI_RECEIVE_WORD?D_SPICALLER1:?PR?VSYNC_INTERRUPT?MAINCALLER2:?C_C51STARTUP该警告表示连接器发现有一个函数可能会被主函数和一个中断服务程序(或者调用中断服务程序的函数)同时调用,或者同时被多个中断服务程序调用。