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What is the location of the main function in the c source program?

青灯夜游

Nov 19, 2020 am 11:06 AM

c languageSource programmain function

C language stipulates that in a source program, the position of the main function can be arbitrary; when executing a program written in C language, the main function is equivalent to the entrance to the execution program; regardless of where the main function is Regardless of the position in the entire process, a C program always starts execution from the mam function.

What is the location of the main function in the c source program?

The operating environment of this tutorial: windows7 system, c99 version, Dell G3 computer.

The C language stipulates that in a source program, the position of the main function can be arbitrary. When executing a program written in C language, the main function is equivalent to the entrance to the executed program. As long as there are no grammatical and logical errors, the main function can be placed anywhere.

Regardless of the position of the main function in the entire process, a C program always starts execution from the mam function.

The main function, also known as the main function, is the entry function of the C program, that is, the execution of the program starts from the main function, and the mobilization of other functions is also directly or indirectly called in the main function.

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 operation.

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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