Question

How can I put the address of the array into a variable?

char * str1 = "Hello";
int add = 0;

Now I want to put the address of the array into add.
I know I can print out the address of the array by the following way:

printf("Address = %p", str1);

But, I want to store the address in the variable.

Answer 1

If you want to store a memory address in a variable, the correct way is to type the variable as std::intptr_t or std::uintptr_t. That is because these types are guaranteed large enough to hold any memory address:

char * str1 = "Hello";
uintptr_t p = (uintptr_t)str1;

Apart from that, note that the value of str1 is already a memory address (it points to H) albeit a different one from the value of &str1 (which points to str1).