arrays

Instructions

Define a function named thirtytwo_tens that returns an array with 32 positions filled with only the value 10, so that [10, 10, 10, ... 10].len() is equal to 32.

Write a function that takes an array of i32 and returns the sum of the elements.

Expected functions

The type of one of the arguments is missing. Use the example main function to determine the correct type.

pub fn sum(a: _) -> i32 {
}

pub fn thirtytwo_tens() -> [i32; 32] {
}

Usage

Here is a program to test your function.

It's incomplete. Use the output and the other available information to figure out what is missing.

use arrays::*;

fn main() {
    let a = (1..=10)._;
    let b = [_];

    println!("The sum of the elements in {:?} is {}", a, sum(&a));
    println!("The sum of the elements in {:?} is {}", b, sum(&b));
    println!(
        "Array of {} elements filled with 10 = {:?}",
        thirtytwo_tens().len(),
        thirtytwo_tens()
    );
}

And its output:

$ cargo run
The sum of the elements in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] is 55
The sum of the elements in [5, 5, 5, 5, 5, 5, 5, 5, 5, 5] is 50
Array of 32 elements filled with 10 = [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10]
$

Notions

• arrays