结构化异常处理和c++异常处理区别

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1、结构化异常处理和C++的异常处理区别结构化异常处理和C++的异常处理区别Windows异常由系统内核代码捕获，然后传递至用户层，多用于非法内存访问、指令错误等，其类型是CPU定义的，参见《X386保护模式编程》。C++异常是C++编译器生成的结构（多在堆栈上），是普通的用户层代码，异常类型由用户自定义。由于Windows异常处理和C++异常处理均使用堆栈展开，在局部堆栈的使用中存在冲突，一般不能混用。__try{}__finally{}不会检查类内析构以及构造等操作但是try()catch()不会存在这样的问题但

2、是C++编译器上的所以异常类型需要你自己定义。__try{......}__except(EXCEPTION_EXECUTE_HANDLER){wprintf(GetExceptionDescribe(GetExceptionCode()));}#pragmaoncetypedefstructtagExcpCode{DWORDdwCode;LPTSTRlpDescribe;}EXCPCODE,*PEXCPCODE;EXCPCODEg_excp_table[]={EXCEPTION_ACCESS_VIOLATION

3、,_T("Thethreadattemptstoreadfromorwritetoavirtualaddressforwhichitdoesnothaveaccess."),EXCEPTION_ARRAY_BOUNDS_EXCEEDED,_T("Thethreadattemptstoaccessanarrayelementthatisoutofbounds,andtheunderlyinghardwaresupportsboundschecking."),EXCEPTION_BREAKPOINT,_T("Abre

4、akpointisencountered."),EXCEPTION_DATATYPE_MISALIGNMENT,_T("Thethreadattemptstoreadorwritedatathatismisalignedonhardwarethatdoesnotprovidealignment.Forexample,16-bitvaluesmustbealignedon2-byteboundaries,32-bitvalueson4-byteboundaries,andsoon."),EXCEPTION_FLT_

5、DENORMAL_OPERAND,_T("Oneoftheoperandsinafloatingpointoperationisdenormal.Adenormalvalueisonethatistoosmalltorepresentasastandardfloatingpointvalue."),EXCEPTION_FLT_DIVIDE_BY_ZERO,_T("Thethreadattemptstodivideafloatingpointvaluebyafloatingpointdivisorof0(zero)

6、."),EXCEPTION_FLT_INEXACT_RESULT,_T("Theresultofafloatingpointoperationcannotberepresentedexactlyasadecimalfraction."),EXCEPTION_FLT_INVALID_OPERATION,_T("Afloatinpointexceptionthatisnotincludedinthislist."),EXCEPTION_FLT_OVERFLOW,_T("Theexponentofafloatingpo

7、intoperationisgreaterthanthemagnitudeallowedbythecorrespondingtype."),EXCEPTION_FLT_STACK_CHECK,_T("Thestackhasoverflowedorunderflowed,becauseofafloatingpointoperation."),EXCEPTION_FLT_UNDERFLOW,_T("Theexponentofafloatingpointoperationislessthanthemagnitudeal

8、lowedbythecorrespondingtype."),EXCEPTION_GUARD_PAGE,_T("ThethreadaccessedmemoryallocatedwiththePAGE_GUARDmodifier."),EXCEPTION_ILLEGAL_INSTRUCTION,_T("Thethreadtriestoexecuteaninvalidinst