rustlingsの回答で学ぶプログラミング言語Rust

14 |  // hint.
15 |  
16 |  // I AM NOT DONE
17 |  
18 |  fn main() {
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⚠️  Compiling of exercises/intro/intro2.rs failed! Please try again. Here's the output:
error: 1 positional argument in format string, but no arguments were given
  --> exercises/intro/intro2.rs:11:21
   |
11 |     println!("Hello {}!");
   |                     ^^

error: aborting due to previous error

⚠️  Compiling of exercises/variables/variables1.rs failed! Please try again. Here's the output:
error[E0425]: cannot find value `x` in this scope
  --> exercises/variables/variables1.rs:11:5
   |
11 |     x = 5;
   |     ^
   |
help: you might have meant to introduce a new binding
   |
11 |     let x = 5;
   |     +++

error[E0425]: cannot find value `x` in this scope
  --> exercises/variables/variables1.rs:12:36
   |
12 |     println!("x has the value {}", x);
   |                                    ^ not found in this scope

error: aborting due to 2 previous errors

⚠️  Compiling of exercises/variables/variables2.rs failed! Please try again. Here's the output:
error[E0282]: type annotations needed
 --> exercises/variables/variables2.rs:9:9
  |
9 |     let x;
  |         ^
  |
help: consider giving `x` an explicit type
  |
9 |     let x: /* Type */;
  |          ++++++++++++

error: aborting due to previous error

⚠️  Compiling of exercises/variables/variables3.rs failed! Please try again. Here's the output:
error[E0381]: used binding `x` isn't initialized
  --> exercises/variables/variables3.rs:10:27
   |
9  |     let x: i32;
   |         - binding declared here but left uninitialized
10 |     println!("Number {}", x);
   |                           ^ `x` used here but it isn't initialized
   |
   = note: this error originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider assigning a value
   |
9  |     let x: i32 = 0;
   |                +++

error: aborting due to previous error

⚠️  Compiling of exercises/variables/variables4.rs failed! Please try again. Here's the output:
error[E0384]: cannot assign twice to immutable variable `x`
  --> exercises/variables/variables4.rs:11:5
   |
9  |     let x = 3;
   |         -
   |         |
   |         first assignment to `x`
   |         help: consider making this binding mutable: `mut x`
10 |     println!("Number {}", x);
11 |     x = 5; // don't change this line
   |     ^^^^^ cannot assign twice to immutable variable

error: aborting due to previous error

⚠️  Compiling of exercises/variables/variables5.rs failed! Please try again. Here's the output:
error[E0308]: mismatched types
  --> exercises/variables/variables5.rs:11:14
   |
9  |     let number = "T-H-R-E-E"; // don't change this line
   |                  ----------- expected due to this value
10 |     println!("Spell a Number : {}", number);
11 |     number = 3; // don't rename this variable
   |              ^ expected `&str`, found integer

error[E0369]: cannot add `{integer}` to `&str`
  --> exercises/variables/variables5.rs:12:48
   |
12 |     println!("Number plus two is : {}", number + 2);
   |                                         ------ ^ - {integer}
   |                                         |
   |                                         &str

error: aborting due to 2 previous errors

⚠️  Compiling of exercises/variables/variables6.rs failed! Please try again. Here's the output:
error: missing type for `const` item
 --> exercises/variables/variables6.rs:8:13
  |
8 | const NUMBER = 3;
  |             ^ help: provide a type for the constant: `: i32`

error: aborting due to previous error

⚠️  Compiling of exercises/functions/functions1.rs failed! Please try again. Here's the output:
error[E0425]: cannot find function `call_me` in this scope
 --> exercises/functions/functions1.rs:9:5
  |
9 |     call_me();
  |     ^^^^^^^ not found in this scope

error: aborting due to previous error

⚠️  Compiling of exercises/functions/functions2.rs failed! Please try again. Here's the output:
error: expected type, found `)`
  --> exercises/functions/functions2.rs:12:16
   |
12 | fn call_me(num:) {
   |                ^ expected type

error[E0425]: cannot find value `num` in this scope
  --> exercises/functions/functions2.rs:13:17
   |
13 |     for i in 0..num {
   |                 ^^^ not found in this scope
   |
help: you might have meant to write `.` instead of `..`
   |
13 -     for i in 0..num {
13 +     for i in 0.num {
   |

error: aborting due to 2 previous errors

⚠️  Compiling of exercises/functions/functions3.rs failed! Please try again. Here's the output:
error[E0061]: this function takes 1 argument but 0 arguments were supplied
  --> exercises/functions/functions3.rs:9:5
   |
9  |     call_me();
   |     ^^^^^^^-- an argument of type `u32` is missing
   |
note: function defined here
  --> exercises/functions/functions3.rs:12:4
   |
12 | fn call_me(num: u32) {
   |    ^^^^^^^ --------
help: provide the argument
   |
9  |     call_me(/* u32 */);
   |            ~~~~~~~~~~~

error: aborting due to previous error

⚠️  Compiling of exercises/functions/functions4.rs failed! Please try again. Here's the output:
error: expected type, found `{`
  --> exercises/functions/functions4.rs:18:30
   |
18 | fn sale_price(price: i32) -> {
   |                              ^ expected type

error: aborting due to previous error

⚠️  Compiling of exercises/functions/functions5.rs failed! Please try again. Here's the output:
error[E0308]: mismatched types
  --> exercises/functions/functions5.rs:13:24
   |
13 | fn square(num: i32) -> i32 {
   |    ------              ^^^ expected `i32`, found `()`
   |    |
   |    implicitly returns `()` as its body has no tail or `return` expression
14 |     num * num;
   |              - help: remove this semicolon to return this value

error: aborting due to previous error

⚠️  Compiling of exercises/if/if2.rs failed! Please try again. Here's the output:
error[E0308]: mismatched types
  --> exercises/if/if2.rs:14:9
   |
10 | pub fn foo_if_fizz(fizzish: &str) -> &str {
   |                                      ---- expected `&str` because of return type
...
14 |         1
   |         ^ expected `&str`, found integer

error: aborting due to previous error

⚠️  Compiling of exercises/if/if3.rs failed! Please try again. Here's the output:
error[E0308]: `if` and `else` have incompatible types
  --> exercises/if/if3.rs:15:9
   |
12 |       } else if animal == "snake" {
   |  ____________-
13 | |         3
   | |         - expected because of this
14 | |     } else {
15 | |         "Unknown"
   | |         ^^^^^^^^^ expected integer, found `&str`
16 | |     };
   | |_____- `if` and `else` have incompatible types

error: aborting due to previous error

⚠️  Compiling of exercises/quiz1.rs failed! Please try again. Here's the output:
error[E0425]: cannot find function `calculate_price_of_apples` in this scope
  --> exercises/quiz1.rs:24:18
   |
24 |     let price1 = calculate_price_of_apples(35);
   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `calculate_price_of_apples` in this scope
  --> exercises/quiz1.rs:25:18
   |
25 |     let price2 = calculate_price_of_apples(40);
   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `calculate_price_of_apples` in this scope
  --> exercises/quiz1.rs:26:18
   |
26 |     let price3 = calculate_price_of_apples(41);
   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope

error[E0425]: cannot find function `calculate_price_of_apples` in this scope
  --> exercises/quiz1.rs:27:18
   |
27 |     let price4 = calculate_price_of_apples(65);
   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^ not found in this scope

error: aborting due to 4 previous errors

⚠️  Compiling of exercises/primitive_types/primitive_types1.rs failed! Please try again. Here's the output:
error: expected identifier, found keyword `if`
  --> exercises/primitive_types/primitive_types1.rs:17:5
   |
17 |     if is_evening {
   |     ^^ expected identifier, found keyword

error: expected one of `:`, `;`, `=`, `@`, or `|`, found `is_evening`
  --> exercises/primitive_types/primitive_types1.rs:17:8
   |
17 |     if is_evening {
   |        ^^^^^^^^^^ expected one of `:`, `;`, `=`, `@`, or `|`

error: aborting due to 2 previous errors

⚠️  Compiling of exercises/primitive_types/primitive_types2.rs failed! Please try again. Here's the output:
error: expected identifier, found keyword `if`
  --> exercises/primitive_types/primitive_types2.rs:25:5
   |
25 |     if your_character.is_alphabetic() {
   |     ^^ expected identifier, found keyword

error: expected one of `:`, `;`, `=`, `@`, or `|`, found `your_character`
  --> exercises/primitive_types/primitive_types2.rs:25:8
   |
25 |     if your_character.is_alphabetic() {
   |        ^^^^^^^^^^^^^^ expected one of `:`, `;`, `=`, `@`, or `|`

error: aborting due to 2 previous errors

⚠️  Compiling of exercises/primitive_types/primitive_types3.rs failed! Please try again. Here's the output:
error: expected expression, found `?`
  --> exercises/primitive_types/primitive_types3.rs:11:13
   |
11 |     let a = ???
   |             ^ expected expression

error: aborting due to previous error