mirror of
https://codeberg.org/andyscott/exercism.git
synced 2024-11-13 23:00:47 -05:00
51 lines
2.3 KiB
Markdown
51 lines
2.3 KiB
Markdown
|
# Hints
|
||
|
|
|
||
|
|
## General
|
||
|
|
|
||
|
|
- `while` loops are used for _indefinite_ (uncounted) iteration
|
||
|
|
- `for` loops are used for _definite_, (counted) iteration.
|
||
|
|
- The keywords `break` and `continue` help customize loop behavior.
|
||
|
|
- `std::to_string()` from `string` library can be used to convert a integer to string
|
||
|
|
|
||
|
|
Also being familiar with the following can help with completing the tasks:
|
||
|
|
|
||
|
|
- [`vectors`][vectors]: indexing, size, [`<vector>.emplace_back`][emplace], [`<vector>.pop_back()`][pop].
|
||
|
|
- [`string`][string]: using the `+` to concatenate strings, integer to string conversion, [`to_string`][to\_string].
|
||
|
|
|
||
|
|
## 1. Rounding Scores
|
||
|
|
|
||
|
|
- `While` loops will continue to execute until their test condition evaluates to `False`.
|
||
|
|
- `<vector>.back()` will return the last item in a `vector`.
|
||
|
|
- `<vector>.pop_back()` will remove the last item in a `vector`.
|
||
|
|
|
||
|
|
## 2. Non-Passing Students
|
||
|
|
|
||
|
|
- A results counter does need to be set up and _incremented_ -- you'll want to `return` the count of non-passing students when the loop terminates.
|
||
|
|
|
||
|
|
## 3. The "Best"
|
||
|
|
|
||
|
|
- - Having an empty `vector` to add the "best" marks to is helpful here.
|
||
|
|
- `<vector>.emplace_back()` can help add things to the results `vector`.
|
||
|
|
|
||
|
|
## 4. Calculating Letter Grades
|
||
|
|
|
||
|
|
- These are _lower thresholds_. The _lower threshold_ for a "D" is a score of **41**, since an "F" is **<= 40**.
|
||
|
|
- `static_cast<int>` without parameters should round off increments nicely.
|
||
|
|
- You are expected to return an array, not a vector.
|
||
|
|
|
||
|
|
## 5. Matching Names to Scores
|
||
|
|
|
||
|
|
- If both containers are the same length and sorted the same way, could you use the `index` from one to retrieve a `value` from the other?
|
||
|
|
- `std::to_string(int)` can be used to convert a number to string.
|
||
|
|
- Don't forget the follow the format of the example's output.
|
||
|
|
|
||
|
|
## 6. A "Perfect" Score
|
||
|
|
|
||
|
|
- There may be or may not be a student with a score of 100, and you can't return an empty string without checking **all** scores.
|
||
|
|
- The `control flow` statements `continue` and `break` may be useful here to move past unwanted values.
|
||
|
|
|
||
|
|
[vectors]: https://en.cppreference.com/w/cpp/container/vector
|
||
|
|
[string]: https://en.cppreference.com/w/cpp/string/basic_string
|
||
|
|
[to\_string]: https://en.cppreference.com/w/cpp/string/basic_string/to_string
|
||
|
|
[emplace]: https://en.cppreference.com/w/cpp/container/vector/emplace_back
|
||
|
|
[pop]: https://en.cppreference.com/w/cpp/container/vector/pop_back
|