C program without main functoin

Answer 1

If we save our program with .c extention before compiling it, the compiler with automatically include the header files. for eg-

First we save our program with sum.c and then compile it. It will not show any error.

1. Compilation needs header files, not execution.

2. Very small example programs can be written without using any header file, eg:

/* mini.c */

extern void (const char *puts);

int main (void)

{

puts ("Hello, world");

return 0;

}

Answer 2

You need one, and only one, main function in every C program. This is the entry point following library initialization. There can be no C program without a main function, unless you want to replace the run-time library - not a good idea.

Answer 3

You can compile it without difficulty, but cannot link it into an executable (still you can link a library).

Answer 4

You can't. Somewhere there must be a main() method, which is the program entry point. It may be the case that the main method is in a separate file somewhere that is included as a reference.

Answer 5

There are no output statements in C. Anyway, here is an example:

int main (void) { return 0; }

Answer 6

Not possible.