Quick Question regarding Pointers

[Aakanaar]

ok.. quick summary of what i know:

char * var;
// var is a pointer variable that holds the memory address where the value is stored

var = &letter;
// the & allows us to assign the memory location of letter rather than it's value 

So when I want to pass the refference of an object to a function, which of the following is correct?

void function(char *var) {...}

char letter = 'a';
function(letter);

or

void function(char var) {...}

char letter='a';
function(&letter);

or (as i've seen in some code)

void function(char &var) {...}

char letter='a';
function(letter);

It can be rather confusing

[Aakanaar]

ok.. i just tried different ones till i got rid of the compiler error.

It would seem that the third method is the correct method.

[Zaita]

It depends on how you want to use it and what scope you want for the variable

void func(char *var) {...}

char letter = 'a';
function(&letter)

void func(char var) {...}

char letter = 'a';
function(letter)

void func(char &var) {...}

char letter = 'a';
function(letter)

All of those should work. However, if you modify letter during func on the second one, it won't modify the original. Whereas the other 2 will.