From: jvasquez AT getntds DOT spam DOT com (John Vasquez)
Newsgroups: comp.os.msdos.djgpp
Subject: pointer to functions - Warning error
Date: Mon, 18 Dec 2000 18:55:56 GMT
Organization: CTSnet Internet Services
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

I have the latest DJGPP compiler.

I use a lot of pointer to functions - If I define it this way I get no
compiler warning (assignment from incompatible pointer type)
int Myfunct(void);
typedef struct _MyStruct{
	int (*funct)(void);
}MyStruct;

in the code I do this:
MyStruct DefineStruct;	//define the structure
DefineStruct.funct = MyFunct; //set the pointer to function
DefineStruct.funct();	//call the function
}

When I have a function that I pass parameters: like this
int Myfunct(int x, void *adr);

typedef struct _MyStruct{
	int (*funct)(int x, void *adr);
}MyStruct;

in the code I do this:
int x;
void *adr;
MyStruct DefineStruct;	//define the structure
DefineStruct.funct = MyFunct; //set the pointer to function <---
Generates a compiler warning message
DefineStruct.funct(x, addr);	//call the function
}
I get the following compiler warning error at DefineStruct.funct =
MyFunct; 

Why? The code I am using was ported over from MS C compiler version
6.0. and I am modifying the code for 32 bit operations. The MS C
compiler never generated a warning error and the program works
perfectly in DOS.

Thank you
John