Introduction - If you have any usage issues, please Google them yourself
Pointer is the essence of the C language, is one of the most important elements of the C language, is part of the most difficult to master. Pointer can be used in the program to process the data, variables, arrays, strings, functions, structure, file and dynamically allocated memory, and so on. The right to use the pointer, can make the process streamlined, flexible, and efficient. Pointer concept is complex, if misused pointer, the program runs unexpected error, this is a beginner the pointer should note the problem. So the pointer is the emphasis and difficulty of the C language