86dccc4ca7
a description starts with the filename, has an optional description and ends with help information
63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
// generics3.rs
|
|
//
|
|
// An imaginary magical school has a new report card generation system written in Rust!
|
|
// Currently the system only supports creating report cards where the student's grade
|
|
// is represented numerically (e.g. 1.0 -> 5.5).
|
|
// However, the school also issues alphabetical grades (A+ -> F-) and needs
|
|
// to be able to print both types of report card!
|
|
//
|
|
// Make the necessary code changes in the struct ReportCard and the impl block
|
|
// to support alphabetical report cards. Change the Grade in the second test to "A+"
|
|
// to show that your changes allow alphabetical grades.
|
|
//
|
|
// If you need help, open the corresponding README.md or run: rustlings hint generics3
|
|
|
|
// I AM NOT DONE
|
|
|
|
pub struct ReportCard {
|
|
pub grade: f32,
|
|
pub student_name: String,
|
|
pub student_age: u8,
|
|
}
|
|
|
|
impl ReportCard {
|
|
pub fn print(&self) -> String {
|
|
format!(
|
|
"{} ({}) - achieved a grade of {}",
|
|
&self.student_name, &self.student_age, &self.grade
|
|
)
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn generate_numeric_report_card() {
|
|
let report_card = ReportCard {
|
|
grade: 2.1,
|
|
student_name: "Tom Wriggle".to_string(),
|
|
student_age: 12,
|
|
};
|
|
assert_eq!(
|
|
report_card.print(),
|
|
"Tom Wriggle (12) - achieved a grade of 2.1"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn generate_alphabetic_report_card() {
|
|
// TODO: Make sure to change the grade here after you finish the exercise.
|
|
let report_card = ReportCard {
|
|
grade: 2.1,
|
|
student_name: "Gary Plotter".to_string(),
|
|
student_age: 11,
|
|
};
|
|
assert_eq!(
|
|
report_card.print(),
|
|
"Gary Plotter (11) - achieved a grade of A+"
|
|
);
|
|
}
|
|
}
|