Learn C language from scratch

I reviewed the shutdown program

I learned yesterday how to write a function to find the maximum value of two numbers. I

learned about the use of various unary operators and relational operators and
logical operators. For example:

the use of conditional operators: the use of

typedef:

The use of static (because the content is too much to summarize a few points):

the use of define, the definition of macros and the realization of functions (the macro method is easier):

2021.1.16 learning