Changing char array value using pointers?

[ETep]

I'm trying to understand pointers. Can someone please explain why this doesn't work. However, if you change all of the types to type int, and the Z to an integer number, the program works fine. Basically, why can you not change the value of a char array?

**I noticed shortly after I posted that I was using "Z" instead of 'Z'**

#include <iostream>
#include <string>

using namespace std;

int main ()
{

char myarray [5];
char *p;

p = myarray;
*p = "Z";

cout<<myarray[0]<<endl;

system("pause");
return 0;
}