rustlings/exercises/generics/generics3.rs

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// 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!
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// 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.
// Execute 'rustlings hint generics3' for hints!
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// I AM NOT DONE
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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)
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}
}
#[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(),
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student_age: 12,
};
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assert_eq!(
report_card.print(),
"Tom Wriggle (12) - achieved a grade of 2.1"
);
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}
#[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(),
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student_age: 11,
};
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assert_eq!(
report_card.print(),
"Gary Plotter (11) - achieved a grade of A+"
);
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}
}