string buffer

[George2]

Hello everyone,


Suppose we defined a string buffer (array), like this,

char array[] = "hello world";
char buf[256]

Sometimes, I noticed that we either use,

1. array (buf)
or use,
2. &array (&buf)
or use
3. &array[0] (&buf[0])

as the beginning address of the array,

example like,

strcpy (buf, array);
strcpy (&buf, array);
...

I am wondering the differences between the 3 approaches, and which approach is the most correct?


thanks in advance,
George

[Elysia]

Erm... both array and buf are the same type of variable, and since they're arrays, they're automatically cast to char* when you type the names, so the first strcpy is correct, and the second is not correct. But from what I understand, it's legal in C (which is just outright silly).
buf == char* and &buf == char**.
strcpy takes a char* and const char*.

1. array (buf)
or use,
2. &array (&buf)
or use
3. &array[0] (&buf[0])

This is just another stupid example.
array is not a function, it's an array - so array(buf) is not valid!
But even array[buf] is really stupid since it would most likely give an access violation (not to mention you're converting char* to int, which is legal in C, but really stupid).

Oh and,
&array[0] (&buf[0])
Is the same as
array(buf)