equality operator in string in c++

//Case 1
char * p = "ram" ;

//compare it with a constant literal string
if( p == "ram")
{
  //condition1
  int i= 1;
}

//case2
char* q = new char[4];
memset(q,0,4);
memcpy(q,"ram",3);

//compare string q with constant literal string
if( q == "ram")
{
    //condition2
    int i=2;
}

In the above code snippet in C++, I found that in case1, if condition evaluates to true and it enters the condition1 while in case2 when I was allocating q pointer dynamically then if condition evaluates to false and it does not enter in the condition2. Can anyone please explain this behaviour of char* with equality operator.

Tags: C++