Question

how to write c-program without main()

Answer 1

I don't think it is quite possible becoz execution in all C programs starts after the function main ()

Answer 2

why would you want to write program without main()?

Answer 3

I believe you can write C programs without main (no preprocessor tricks).

Answer 4

http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf check page 23

Answer 5

http://stackoverflow.com/questions/4113731/is-a-main-required-for-a-c-program