Summary-C language-pointer

Summary-C language-pointer

1. embedded systems often have requirementsProgramUsers access the features of a specific memory location. In a project, it is required to set the value of an integer variable with the correct IP address 0x67a9 to 0xaa66. the compiler is a pure ANSI compiler that writes a code to complete this task.

Note: Whether you know that it is legal to forcibly convert an integer (ypecast) into a pointer to access an absolute address,

Answer:

Int * PTR;

PTR = (int *) 0x67a9;

* PTR = 0xaa66;

A relatively obscure method is:

* (Int * const) (0x67a9) = 0xaa66;

Even if your taste is closer to the second solution, I suggest you use the first solution during the interview.

2.