Thread: address of constant

Hello everyone,


I have tried that even if I have multiple character pointer variables, if the content they pointed to are the same, they are allocated with the same value. So, I think from compiler point of view, the constant with the same content shares the single copy in memory?

Here is my test program in Visual Studio 2005.

Code:

#include <windows.h>

int main (int argc, char** argv)
{
	char* abc = "Hello";

	char* abc2 = "Hello";

	// the value (address) of abc is the same as abc2

	return 0;
}

thanks in advance,
George

Well George, abc points to read-only memory (string literals are read only, but they can be stored in writeable memory, like an array of characters). Therefore, one storage space for "Hello" should be sufficient since it is never moved or edited. Memory that you are allowed to write to is different, and may require several copies of the same object, like two integers that happen to be 4.