Passing a function to a function

[lend0g]

Can anybody give me an example of passing a function to a function. i have to do one for a current project and i need some help on it. here is the class member function

void Tran(void Lookup(Name,Value));

the function LookUp is declared at the top of Main().
If u know how, u dont need to use what i have above, just please give me an example on how i would call a class member function in main with a parameter like this, if u can please help. thank you

[no-one]

you would probably wanna make

this:

void Tran(void Lookup(Name,Value));

this: using a pointer

void Tran(void (*Lookup)(type Name,type Value));

for member functions its done like so

void Tran(void (myclass::*myfunc) (type Name, type Value));

or whatever.

edit::

actually i think an exampe is in order, since you'll most likely need one on how to call a non-static method pointer.

the simplest explaination is that a functions pointer to a non static class method requires an instance of the class inorder to be called.

ie:

#include <iostream>
using namespace std;

class testClass;

typedef void (testClass::*methodptr)(int i);

class testClass
{
public:
	void method(int i);
	void method2(methodptr met);
};

void testClass::method(int i)
{ 
	cout << i << endl;
}

void testClass::method2(methodptr met)
{
	(this->*met)(10);
	(*this.*met)(1000);
}

int main(void)
{	
	testClass tci;
	testClass* tcp = &tci;
	
	methodptr meth = tci.method;
	tci.method2(tci.method);
	(tci.*meth)(1);
	(tcp->*meth)(100);
	
	return 0;
}