Решение на упр.02 задача 1 от Пламен Колев

Обратно към всички решения

Към профила на Пламен Колев

Код

fn duplicate_i32(x: i32) -> (i32, i32) {

(x, x)

}

fn duplicate_string(s: String) -> (String, String) {

(s.clone(), s)

}

fn main() {

let a = 10;

let (a1, a2) = duplicate_i32(a);

println!("a1 = {}, a2 = {}, original a = {}", a1, a2, a);

let s = String::from("Здравей");

let (s1, s2) = duplicate_string(s);

println!("s1 = {}, s2 = {}", s1, s2);

// b) i32 е Copy тип, а String не е Copy тип и затова можем да използваме x, но не и s

// след извикването

// c) При (s,s) след като първия елемент s придобие собственост, то стойността вече е преместена и

// компилатора ще даде грешка

}

Лог от изпълнението

Updating crates.io index
     Locking 17 packages to latest compatible versions
   Compiling proc-macro2 v1.0.102
   Compiling unicode-ident v1.0.20
   Compiling quote v1.0.41
   Compiling futures-core v0.3.31
   Compiling futures-sink v0.3.31
   Compiling futures-channel v0.3.31
   Compiling pin-project-lite v0.2.16
   Compiling pin-utils v0.1.0
   Compiling slab v0.4.11
   Compiling futures-io v0.3.31
   Compiling syn v2.0.108
   Compiling memchr v2.7.6
   Compiling futures-task v0.3.31
   Compiling solution v0.1.0 (/tmp/d20251023-1757769-r4mjo1/solution)
warning: function `duplicate_i32` is never used
 --> src/lib.rs:1:4
  |
1 | fn duplicate_i32(x: i32) -> (i32, i32) {
  |    ^^^^^^^^^^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: function `duplicate_string` is never used
 --> src/lib.rs:5:4
  |
5 | fn duplicate_string(s: String) -> (String, String) {
  |    ^^^^^^^^^^^^^^^^

warning: function `main` is never used
 --> src/lib.rs:9:4
  |
9 | fn main() {
  |    ^^^^

warning: `solution` (lib) generated 3 warnings
   Compiling futures-macro v0.3.31
   Compiling futures-util v0.3.31
   Compiling futures-executor v0.3.31
   Compiling futures v0.3.31
warning: function `main` is never used
 --> tests/../src/lib.rs:9:4
  |
9 | fn main() {
  |    ^^^^
  |
  = note: `#[warn(dead_code)]` on by default

warning: `solution` (test "solution_test") generated 1 warning
    Finished `test` profile [unoptimized + debuginfo] target(s) in 8.81s
     Running tests/solution_test.rs (target/debug/deps/solution_test-fc1324dc0157cdc7)

running 1 test
test solution_test::test_basic ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

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