prinf macro in rust

add to Cargo.toml dependencies

toml [dependencies] printf-rs = "0.1.0" libc = "0.2.46"

Example 1

```rust use printf_rs::*;

fn main() { printf!("%s \n", cstr!("Hello World !")); // print string printf!("%i \n", 1234); // print integer } ```

Example 2

rust use printf_rs::*; use std::thread::sleep; use std::time::Duration; fn main() { let chars = vec!['a','b','c','d','e','f']; // print char with \r (carriage return) Moves the active position to the initial position of the current line. for c in chars { printf!("\r %lc ",c); sleep(Duration::from_secs(2)); } }