import std::print;
import std::from_str;
import std::add_char;
import std::set_char;
import std::free_string;
import std::add_num_to_str;

fn main() -> i32 {
    let mut test = from_str("hello world");

    add_char(&mut test, '!');
    set_char(&mut test, 'B', 0);
    add_num_to_str(&mut test, 7);
    
    print(&test);

    free_string(&mut test);

    return 0;
}