What is the location of the main function in a source program specified by the C language?-C#.Net Tutorial-php.cn

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What is the location of the main function in a source program specified by the C language?

青灯夜游

Oct 27, 2020 am 11:12 AM

c language

The C language stipulates that the position of the main function in a source program can be arbitrary; because a C program always starts execution from the main function and ends in the main function, regardless of the position of the main function in the entire process. How about the location.

What is the location of the main function in a source program specified by the C language?

A C program has one and only one main function. In addition to the main function, there can be several other functions. Each function implements a specific function. operate.

The C language stipulates that in a source program, the position of the main function can be arbitrary.

Because: In a C language source program, the program always starts execution from the main function, regardless of the position of the main function in the entire process.

The main function, also known as the main function, is the starting point of program execution. Main is relative, just like the main tone of phonetic theory is overtones, and overtones are the parts in the program other than main. Other functions are generated to cater to people's way of thinking rather than inevitable patterns. There are primary and secondary functions, and the execution is clear and logical, which not only modularizes the program but also creates a closed whole.

Program execution always starts from the main function. If there are other functions, it will return to the main function after completing the calls to other functions. Finally, the main function ends the entire program. When the program is executed, the main function is called by the system. The main function is called after initialization of non-local objects with static storage duration is completed during program startup. It is the designated entry point for a program in a hosted environment (that is, an operating system). Entry points for stand-alone programs (boot loaders, operating system kernels, etc.) are implementation-defined.

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