The specific purpose is to use this kind of data itself, without an *.
Of course, you can bring it, but that's another way to use it.
int a = 123;
int * t = & ampa; //Declare an integer pointer variable T, pointing to the address of integer data A. ..
//Subsequent use
T = NULL// Point t to an empty address.
* t = 456// Assign a value to the data pointed by t..