#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::ffi::CStr;
use std::os::raw::c_char;
unsafe extern "C" fn my_string() -> *const c_char {
    c"hello".as_ptr()
}
fn my_string_safe() -> String {
    let cstr = unsafe { CStr::from_ptr(my_string()) };
    cstr.to_string_lossy().into_owned()
}
fn main() {
    println!("string: {}", my_string_safe());
}