What does void main mean in c++

The program entry point in C is the void main function, whose main purpose is to declare the entry point, create an execution environment and call other functions to execute program logic. This function does not return any value (void), the function name is main, and the return type is int (usually returning 0 indicates a normal exit).

void main in C

In C, the void main function is a program The entry point is also the starting point of program execution.

Purpose

##void main The main purpose of the function is:

Declare the entry point of the program
Create an environment for program execution
• Call other functions to execute program logic

Syntax

void main The syntax of the function is as follows:

int main(void)

• void: The specified function does not return any value.
• main: Function name. In C, the main function name is predefined and cannot be changed.

Return type

void main The return type of the function is int, indicating that the function returns an integer. Normally returns 0 when the program exits normally.

Example

The following is a simple C program containing the

void main function:

#include <iostream>

void main()
{
    std::cout << "Hello, world!" << std::endl;
}

Note Matter

• No need to declare a type: Unlike other C functions, the void main function does not need to declare a return type.
• No parameters required: void main The function has no parameters because no parameters need to be passed to start the program.
• Alternative usage: In C, you can also use int main() as the entry point of the program, which is the same as void main, But it is more in line with the conventions of C language.

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