1 int i is a stack variable, and its space is placed in the stack space.

2 9 is stored in binary mode in the stack variable i.

3 Why does the system recognize 9? In fact, the system does not recognize 9, it only recognizes binary. All system operations ultimately belong to binary operations.

What if you must know how to operate in binary? It is recommended to learn about digital circuits.

To put it simply, different binary bits of the storage unit are accessed through the address bus, and the data operations on the basic unit are completed through basic operations on the binary bits. The width of the address bus is actually the number of bits we are talking about, and the basic arithmetic unit is usually a register unit.

In a simple sense, all calculations are to first import the memory data into the register, and then the CPU calculates