Getting Error When Declaring and Assigning Pointer...
using namespace std;
*n = 20;
Error is: Run-Time Check Failure #3 - The variable 'n' is being used without being initialized.
Using Visual Studio 2010
You pretty much mixed C & C++. iostream and namespace std are actually components of C++. Despite, that works fine for me. Tried with GCC (after removing C++ components) as well as VC++ 2010.
Its possibly misconfiguration in your complier. The code is working.
Besides using the C++ components, you probably should change your use of pointers.
When you first declare the pointer it points to some random spot in memory, that something else could be using. Then when you asign that memory location the value of 20 it will overwrite the previous value. Because the memory wasn't "yours" to begin with, it could mess things up, even if it looks like there were no compilation errors.
Instead use one of these options:
int *n = (int*)malloc(sizeof(int)); //here you allocate memory to store an interger in and you have your pointer point to it.
*n = 20; //now you can use the pointer to access and change to value stored at that spot in memory
int a = 7; //when you declare a normal variable memory gets allocated automatically
int *n = &a; //you can now create a pointer that points to the same spot in memory
*n = 20; //and you can change the value stored there
-sorry if this wasn't the clearest explanation, but if you really want to learn all this you should just watch the videos on pointers and
dynamic memory management
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This blog is a reminder that cheating in software development can get you into big trouble. Sometimes developers get really really lazy, OR are pressured to write something using overly simplified data structures. Almost every time this happens you are bitten in the butt! Sometimes the problems show up immediately and other times it may take months or years (especially in integrated systems).
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