Решение на упр.02 задача 2 от Милан Стойчев
Резултати
- 1 точка от тестове
- 0 бонус точки
- 1 точка общо
- 1 успешни тест(а)
- 0 неуспешни тест(а)
Код
fn print_str(s: &str) {
println!("Стрингово съдържание: {}", s);
}
fn append_exclamation(s: &mut String) {
s.push('!');
}
fn main() {
let mut s = String::from("Здравей");
let r1 = &s; let r2 = &mut s;
print_str(&s);
append_exclamation(&mut s);
print_str(&s);
}
// b) Защото изпозлваме &str когато ни трябва само да прочетем дедена стойност
// c) Защото използваме &mut str се използва по-рядко за такъв тип подификации
// d) Да ще се компилира. Защото типът String ползволява да го използваме за четене и писане, но същото не можем да кажем за &str....
Лог от изпълнението
Updating crates.io index
Locking 17 packages to latest compatible versions
Compiling proc-macro2 v1.0.103
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 slab v0.4.11
Compiling syn v2.0.108
Compiling futures-io v0.3.31
Compiling futures-task v0.3.31
Compiling pin-utils v0.1.0
Compiling memchr v2.7.6
Compiling pin-project-lite v0.2.16
Compiling solution v0.1.0 (/tmp/d20251024-1757769-10e765k/solution)
warning: unused variable: `r1`
--> src/lib.rs:11:9
|
11 | let r1 = &s; let r2 = &mut s;
| ^^ help: if this is intentional, prefix it with an underscore: `_r1`
|
= note: `#[warn(unused_variables)]` on by default
warning: unused variable: `r2`
--> src/lib.rs:11:22
|
11 | let r1 = &s; let r2 = &mut s;
| ^^ help: if this is intentional, prefix it with an underscore: `_r2`
warning: function `print_str` is never used
--> src/lib.rs:1:4
|
1 | fn print_str(s: &str) {
| ^^^^^^^^^
|
= note: `#[warn(dead_code)]` on by default
warning: function `append_exclamation` is never used
--> src/lib.rs:5:4
|
5 | fn append_exclamation(s: &mut String) {
| ^^^^^^^^^^^^^^^^^^
warning: function `main` is never used
--> src/lib.rs:9:4
|
9 | fn main() {
| ^^^^
warning: `solution` (lib) generated 5 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: unused variable: `r1`
--> tests/../src/lib.rs:11:9
|
11 | let r1 = &s; let r2 = &mut s;
| ^^ help: if this is intentional, prefix it with an underscore: `_r1`
|
= note: `#[warn(unused_variables)]` on by default
warning: unused variable: `r2`
--> tests/../src/lib.rs:11:22
|
11 | let r1 = &s; let r2 = &mut s;
| ^^ help: if this is intentional, prefix it with an underscore: `_r2`
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 3 warnings
Finished `test` profile [unoptimized + debuginfo] target(s) in 8.19s
Running tests/solution_test.rs (target/debug/deps/solution_test-8a95694fa7066c20)
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