Recap - Grade Summarizer

Part of the Logic & Flow section of Coddy's Rust journey — lesson 66 of 66.

Challenge

Easy

You will receive multiple inputs representing student grades. The first input is a number indicating how many grades will follow. Then you will receive that many grade values (one per line). Process these grades and provide a comprehensive summary.

Requirements:

Read the first input (number of grades), trim whitespace, and parse it to i32
Create an empty vector to store the grades
Use a loop to read each grade, trim whitespace, parse it to i32, and add it to the vector
Calculate the average grade (sum of all grades divided by the count)
Find the highest grade in the vector
Find the lowest grade in the vector
Count how many grades are passing (70 or above)
Count how many grades are failing (below 70)
Print the results in the exact format shown below

Output Format:

Line 1: Average: X (where X is the average as an integer)
Line 2: Highest: X (where X is the highest grade)
Line 3: Lowest: X (where X is the lowest grade)
Line 4: Passing: X (where X is the count of passing grades)
Line 5: Failing: X (where X is the count of failing grades)

Input:

First line: Number of grades (e.g., 5)
Following lines: Individual grade values (e.g., 85, 92, 67, 78, 95)

Output:

Five lines showing the average, highest, lowest, passing count, and failing count

Try it yourself

use std::io;

fn main() {
    // Read the number of grades
    let mut count_input = String::new();
    io::stdin().read_line(&mut count_input).expect("Failed to read line");
    let count: i32 = count_input.trim().parse().expect("Invalid number");
    
    // Create a vector to store grades
    let mut grades: Vec<i32> = Vec::new();
    
    // Read each grade
    for _ in 0..count {
        let mut grade_input = String::new();
        io::stdin().read_line(&mut grade_input).expect("Failed to read line");
        let grade: i32 = grade_input.trim().parse().expect("Invalid number");
        grades.push(grade);
    }
    
    // TODO: Write your code below
    // Calculate average, find highest, find lowest, count passing and failing grades
    
    
    
    // Output the results in the required format
    // println!("Average: {}", average);
    // println!("Highest: {}", highest);
    // println!("Lowest: {}", lowest);
    // println!("Passing: {}", passing_count);
    // println!("Failing: {}", failing_count);
}