error C2440: 'initializing' : cannot convert from 'mbException (__cdecl *)(mbRequestP

sapan_shah143 · #1 15-May-2008, 06:27

hi every one i got this error. i need help regarding this.

error C2440: 'initializing' : cannot convert from 'mbException (__cdecl *)(mbRequestPDU)' to 'BYTE'

code for function handler is

CPP / C++ / C Code:

typedef mbException ( *pmbFunctionHandler ) ( mbRequestPDU );

typedef struct
{

	BYTE mbFunctionCode;   /* variable for function code */
	pmbFunctionHandler mbHandler;  /* variable for function call */

}mbFunctionHandler;

and code for array of function call

CPP / C++ / C Code:

static mbFunctionHandler xFuncHandlers[mbMaxHnadlers] = {

	#if mbReadCoilStatus_EN > 0
:arrow: 			(mbReadCoilStatus, mbfunReadCoilStatus),
	#endif

	#if mbReadInputStatus_EN > 0
			(mbReadInputStatus, mbfunReadInputStatus),
	#endif

	#if mbReadOutputRegister_EN > 0
			(mbReadOutputRegister, mbfunReadOutputRegister),
	#endif

};

i got error at the point arrow shows.

can any one help me. BYTE is unsigned character

davekw7x · #2 15-May-2008, 08:40

Quote:

Originally Posted by sapan_shah143

error C2440: 'initializing' : cannot convert from 'mbException (__cdecl *)(mbRequestPDU)' to 'BYTE'

...BYTE is unsigned character

Sometimes error messages are not very enlightening as to the specific nature of the problem.

Here's one thing that I see. Although it's not exactly obvious, I'm thinking it could lead to that error message, but regardless of that particular message, it's just wrong:

Your initializer list for the array of structs is wrong. Items in an initializer list are enclosed in {} braces, not () parentheses.

So, try:

CPP / C++ / C Code:

    #if mbReadCoilStatus_EN > 0
            {mbReadCoilStatus, mbfunReadCoilStatus}, /* {} braces, not () parentheses */
    #endif
.
.
.

Regards,

Dave

sapan_shah143 · #3 15-May-2008, 23:09

thanks a lot dave. i got solution. it was a silly mistake

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