use std::env;



fn encrypt(key: i32, str_to_encrypt: &str) -> String {
    let size_str = str_to_encrypt.char().count(), str_to_encrypt();
    let mut i: i32 = 0;

    while i <= size_str {
            str_to_encrypt[i] = str[i] + key;
            i += 1;
        }
    return (str_to_encrypt);
}

fn main() {
    /*let args: Vec<String> = env::args().collect();
    let mut str_to_encrypt = &args[2];
    */
    let mut str_to_encrypt: &str = "Encrypt moi ca cocotte";
    let key = 1;
    let crypted: String = encrypt(key, str_to_encrypt);
    println!("Your sentence as been changed {}", crypted);
}