feat: move generics3 to be quiz3
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// An imaginary magical school has a new report card generation system written in Rust!
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// Currently the system only supports creating report cards where the student's grade
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// is represented numerically (e.g. 1.0 -> 5.5).
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// However, the school also issues alphabetical grades (A+ -> F-) and needs
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// to be able to print both types of report card!
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// Make the necessary code changes in the struct ReportCard and the impl block
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// to support alphabetical report cards. Change the Grade in the second test to "A+"
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// to show that your changes allow alphabetical grades.
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// Execute 'rustlings hint generics3' for hints!
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// I AM NOT DONE
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pub struct ReportCard {
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pub grade: f32,
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pub student_name: String,
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pub student_age: u8,
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}
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impl ReportCard {
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pub fn print(&self) -> String {
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format!("{} ({}) - achieved a grade of {}",
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&self.student_name, &self.student_age, &self.grade)
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn generate_numeric_report_card() {
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let report_card = ReportCard {
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grade: 2.1,
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student_name: "Tom Wriggle".to_string(),
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student_age: 12,
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};
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assert_eq!(
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report_card.print(),
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"Tom Wriggle (12) - achieved a grade of 2.1"
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);
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}
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#[test]
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fn generate_alphabetic_report_card() {
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// TODO: Make sure to change the grade here after you finish the exercise.
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let report_card = ReportCard {
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grade: 2.1,
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student_name: "Gary Plotter".to_string(),
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student_age: 11,
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};
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assert_eq!(
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report_card.print(),
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"Gary Plotter (11) - achieved a grade of A+"
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);
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}
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}
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@ -1,16 +1,32 @@
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// quiz3.rs
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// This is a quiz for the following sections:
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// - Tests
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// This quiz tests:
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// - Generics
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// - Traits
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// An imaginary magical school has a new report card generation system written in Rust!
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// Currently the system only supports creating report cards where the student's grade
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// is represented numerically (e.g. 1.0 -> 5.5).
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// However, the school also issues alphabetical grades (A+ -> F-) and needs
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// to be able to print both types of report card!
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// This quiz isn't testing our function -- make it do that in such a way that
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// the test passes. Then write a second test that tests that we get the result
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// we expect to get when we call `times_two` with a negative number.
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// No hints, you can do this :)
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// Make the necessary code changes in the struct ReportCard and the impl block
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// to support alphabetical report cards. Change the Grade in the second test to "A+"
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// to show that your changes allow alphabetical grades.
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// Execute `rustlings hint quiz3` or use the `hint` watch subcommand for a hint.
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// I AM NOT DONE
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pub fn times_two(num: i32) -> i32 {
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num * 2
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pub struct ReportCard {
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pub grade: f32,
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pub student_name: String,
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pub student_age: u8,
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}
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impl ReportCard {
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pub fn print(&self) -> String {
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format!("{} ({}) - achieved a grade of {}",
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&self.student_name, &self.student_age, &self.grade)
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}
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}
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#[cfg(test)]
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@ -18,13 +34,29 @@ mod tests {
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use super::*;
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#[test]
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fn returns_twice_of_positive_numbers() {
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assert_eq!(times_two(4), ???);
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fn generate_numeric_report_card() {
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let report_card = ReportCard {
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grade: 2.1,
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student_name: "Tom Wriggle".to_string(),
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student_age: 12,
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};
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assert_eq!(
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report_card.print(),
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"Tom Wriggle (12) - achieved a grade of 2.1"
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);
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}
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#[test]
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fn returns_twice_of_negative_numbers() {
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// TODO replace unimplemented!() with an assert for `times_two(-4)`
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unimplemented!()
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fn generate_alphabetic_report_card() {
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// TODO: Make sure to change the grade here after you finish the exercise.
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let report_card = ReportCard {
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grade: 2.1,
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student_name: "Gary Plotter".to_string(),
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student_age: 11,
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};
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assert_eq!(
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report_card.print(),
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"Gary Plotter (11) - achieved a grade of A+"
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);
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}
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}
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31
info.toml
31
info.toml
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@ -681,19 +681,6 @@ Maybe we could update the explicit references to this data type somehow?
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If you are still stuck https://doc.rust-lang.org/stable/book/ch10-01-syntax.html#in-method-definitions
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"""
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[[exercises]]
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name = "generics3"
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path = "exercises/generics/generics3.rs"
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mode = "test"
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hint = """
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To find the best solution to this challenge you're going to need to think back to your
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knowledge of traits, specifically Trait Bound Syntax - you may also need this: "use std::fmt::Display;"
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This is definitely harder than the last two exercises! You need to think about not only making the
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ReportCard struct generic, but also the correct property - you will need to change the implementation
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of the struct slightly too...you can do it!
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"""
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# TRAITS
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[[exercises]]
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@ -716,6 +703,16 @@ Try mutating the incoming string vector.
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Vectors provide suitable methods for adding an element at the end. See
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the documentation at: https://doc.rust-lang.org/std/vec/struct.Vec.html"""
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# QUIZ 3
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[[exercises]]
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name = "quiz3"
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path = "exercises/quiz3.rs"
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mode = "test"
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hint = """
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To find the best solution to this challenge you're going to need to think back to your
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knowledge of traits, specifically Trait Bound Syntax - you may also need this: "use std::fmt::Display;""""
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# TESTS
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[[exercises]]
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@ -748,14 +745,6 @@ You can call a function right where you're passing arguments to `assert!` -- so
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something like `assert!(having_fun())`. If you want to check that you indeed get false, you
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can negate the result of what you're doing using `!`, like `assert!(!having_fun())`."""
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# TEST 3
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[[exercises]]
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name = "quiz3"
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path = "exercises/quiz3.rs"
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mode = "test"
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hint = "No hints this time ;)"
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# STANDARD LIBRARY TYPES
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[[exercises]]
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