main prototype

#include <stdio.h>

int main(void);

1. #include <stdio.h>: This line includes the standard input/output header file in the program.

2. int main(void): This is the main function of the program, which returns an integer and takes no arguments.

Explanation:

The #include <stdio.h> line is used to include the standard input/output header file in the program, which allows the program to perform input and output operations.

The int main(void) function is the entry point of the C program. It returns an integer value and takes no arguments. All C programs must have a main function, and it is where the execution of the program begins.