fn borrowing() {
    let print_vektor=|x:&Vec<i32>|
        {
            println!("x[0] = {}",x[0]);
        };
    let v= vec![1,4,5,];
    print_vektor(&v);
    println!("{:?}",v);


    let mut a=40;
    let b=&mut a;
    *b+=2;
    println!("b={}",b);
    println!("a={}",a);

    let mut z=vec![1,4,5,9];
    for i in &z{
        println!("i:{}",i);
        //z.push(66);
    }

}
fn main() {
    borrowing();
}