can this be done with fuction pointers

[sanddune008]

void addNode(void);
void delNode(void);
void modifyNode(void);
void updateNode(void);
void clarifyNode(void);
void (*calback)();	

long functionTable[]=
{
	addNode,
    delNode,
    modifyNode,
    updateNode,
    clarifyNode,
};

int main(void)
{
	unsigned int sel;
	printf("Enter choice:");
    scanf("%d",&sel);
    if(sel<(LAST));
		calback(functionTable[sel]);
}

void addNode()
{
		printf("addNode\n");

}
void delNode()
{
		printf("delNode\n");

}void modifyNode()
{
		printf("modifyNode\n");

}
void updateNode()
{
		printf("updateNode\n");

}
void clarifyNode()
{
		printf("clarifyNode\n");

}

I am getting following warnings
Cos I have declared function to be void
'initializing' : 'long ' differs in levels of indirection from 'void (__cdecl *)(void )'

1. In my case what should be the datatype of the array of function pointers
functionTable[]

2. If I am taking a void function as my argument in the function pointer how should i declare him.void (*calback)(?);

Thanks to all

[Banfa]

I am getting following warnings
Cos I have declared function to be void
'initializing' : 'long ' differs in levels of indirection from 'void (__cdecl *)(void )'

1. In my case what should be the datatype of the array of function pointers
functionTable[]

2. If I am taking a void function as my argument in the function pointer how should i declare him.void (*calback)(?);

Thanks to all

This can be done with function pointers, the answer to question 1 is in the warning you have posted. The data type of each member of the array needs to be void (*)(void), a function pointer to a function that takes no parameters and returns nothing not long, it would be declared as

void (*FunctionTable[])(void) = { ... };

Personally I find function pointers a little confusing so to simplfy this a little I normally typedef my function pointer type before declaring the array

typedef void (*FNVOIDRVOID)( void);

then the table becomes

FNVOIDRVOID FunctionTable[] = { ... };

Your declaration and use of callback is flawed. It is not required you make the function call using functioFunction Table like this

(FunctionTable[0])();

Obviously changing the index as required.

You have not declared LAST

For a simple case like your example I would probably use a simple switch statement.

[weaknessforcats]

What kind of function has no arguiments (void) and returns nothing (void)?

That is, there are functions wioth no input and no output?

Or, I suspect you are using global variables, which is a big no-no.

Read this: http://bytes.com/topic/c/insights/73...obal-variables