Thread: Help with Pointer Arrays

I'm trying to Print each string on an array pointer
(one by one)
EXAMPLE:

JOHN
JAME
BILL
DOUG
SAM
So on.......

Which loop would help me do that with a pointer array

I've used the "%s" Format and every time i compile the program closes becuse of an error

what i have is:

Code:

void print ( *array)

{
    

}

i want to print that array that has all the string values
one by one like if every word had a "\n"

Using arrays and pointers can be tricky. The question is how are you passing your array to the function?

As Elysia has mentioned earlier, this may help:

Read up on Arrays and Pointers:
http://cpwiki.sourceforge.net/A_pointer_on_pointers

Originally Posted by slingerland3g

Using arrays and pointers can be tricky. The question is how are you passing your array to the function?

As Elysia has mentioned earlier, this may help:

Read up on Arrays and Pointers:
http://cpwiki.sourceforge.net/A_pointer_on_pointers

I have a question on this that maybe you can settle once and for all. Isn't this code (from that FAQ) problematic in that "MyInt" is not defined as a global variable?

Code:

void foo(int* MyInt)
{
	std::cout << "Address of MyInt: " << &MyInt << std::endl;
	std::cout << "Value of MyInt (address of original MyInt): " << MyInt << std::endl;
	std::cout << "Value of original MyInt: " << *MyInt << std::endl;
}

int main()
{
	int MyInt = 100;
	std::cout << "Value of MyInt: " << MyInt << ", address of MyInt: " << &MyInt << std::endl;
	foo(&MyInt);
	return 0;
}

Is it acceptable to pass a pointer to a value that is defined within the confines of a single method? I would think that would be a problem.

Originally Posted by laserlight

It is not a problem since the object pointed to continues to exist as it has not yet gone out of scope. It just happens that control is now in an inner scope, that of the function being called.

Does this differ in C (vs. C++)? I could swear that I've had problems in C where I've passed a pointer, to a variable not defined as a global variable, to another method and it's caused unpredictable results.

Could be coincidence, I suppose. I'm still very much learning.

If you pass a pointer to a variable into a function, that memory location pointed to will remain valid during the function call. C or C++, no difference.

Edit: I suppose it's possible that you passed a pointer to a string literal into a function, and you tried to overwrite that string literal. String literals are constant and can't be changed.

Originally Posted by laserlight

No, not in this case.

Cool - thanks. I'll have to back and re-read my code with that in mind.