1)I am reading a code and I want to know the meaning of the following code:

Code:
typedef unsigned int e;
typedef unsigned int* r;
typedef unsigned int** a;
typedef unsigned int*** b;
typedef unsigned int**** t;
2)what does it mean having 1, 2, 3 or 4 stars attached to the int or having them atached to the variable for example int **a and int** a.

3)Is it true that...