C primer plus Fifth Edition

1. C language refreshes the output buffer in three cases: the buffer zone is full, and line breaks and inputs are encountered.

2. in C language, the compiler can select which parameter value in the function is calculated first, which improves the compiler efficiency. However, if incremental operators are used in parameters, this may cause trouble. I. e. Do not be too smart.

3. a c variable may have three types of links: External links, internal links, and empty links.

4. a c variable may have the following storage periods: static storage periods and automatic storage periods.ProgramThe variables that exist in the running process, while the dynamic storage period refers to the situation where the memory is allocated when entering the region, and the memory is released when it leaves.

5. there are four Storage types: auto, register, static, and extern. Auto is a local and descriptive item. Register cannot obtain an address. static storage has static storage, even ifCodeNot run, extern type, if the variable has a file acting on, it must be an external link.

6. Scope: The file acts on, the function acts on, and the code block scope.