rust_ex2.rs

fn print_sum(a: i32, b: i32) {
    println!("{}", a + b);
    // the copied a and b are dropped and deallocated here
}

fn main() {
    let a = 35;
    let b = 42;
    // copy the values and transfer
    // ownership over the copies to print_sum:
    print_sum(a, b);
    // we still retain full control over
    // the original a and b variables here
    println!("We still have {} and {}", a, b);
    // the original a and b are dropped and deallocated here
}