The line beginning with "printf("%d degrees celsius" is missing a semicolon.
You should not say something like 5 / 9 in C. Division in an integer expression will round down, such that 5 / 9 = 0. Say something more like 5.0 / 9.0, or promote "degrees" to a float, so that the compiler knows to use floating point math.
Also maybe some compilers will complain that there is no return type for main().
You should try to get your compiler working. As potential asks, what do you mean "something is wrong with it"?