What are the basic functional modules in C language programs?

The basic functional module in C language program is "function". A C language program can be composed of a main function and several functions; a large application program should generally be divided into multiple program modules, each module is used to implement a function, and the function of the module is completed by functions.

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The basic functional module in the c language program is "function ".

A C language program can be composed of a main function and several functions. A large application program should generally be divided into multiple program modules, each module is used to implement a function. The functions that implement these modules can be called subroutines. In C language, the functions of modules are completed by functions. Usually a program written in tc only has one file, but when writing a large program in C language, you cannot write all the code in one file, but have to write it in many files. In this way, they can be written and compiled separately, thereby improving debugging efficiency and increasing the portability of C program modules. A source file can be shared by multiple C programs.

A file can be called a source program file, and a source program file consists of one or more functions. In the C language, a function is the smallest unit that makes up a program. A source program file is a compilation unit, that is, the compiler compiles in source program units instead of function units.

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