X-Git-Url: https://git.ralfj.de/rust-101.git/blobdiff_plain/63b086dfbd9a5e90700f595c2e6ef7ee10522559..f9bb29fcf0e25966dddd1dca29d70d392a5dfdca:/src/part01.rs

diff --git a/src/part01.rs b/src/part01.rs
index 8b14050..05696a5 100644
--- a/src/part01.rs
+++ b/src/part01.rs
@@ -9,6 +9,7 @@ use std;
 // terms you write down are not just *statements* (executing code), but *expressions*
 // (returning a value). This applies even to the body of entire functions!
 
+// ## Expression-based programming
 // For example, consider `sqr`:
 fn sqr(i: i32) -> i32 { i * i }
 // Between the curly braces, we are giving the *expression* that computes the return value.
@@ -55,6 +56,7 @@ fn vec_min(v: Vec<i32>) -> NumberOrNothing {
 // Now that's already much shorter! Make sure you can go over the code above and actually understand
 // every step of what's going on.
 
+// ## Inherent implementations
 // So much for `vec_min`. Let us now reconsider `print_number_or_nothing`. That function
 // really belongs pretty close to the type `NumberOrNothing`. In C++ or Java, you would
 // probably make it a method of the type. In Rust, we can achieve something very similar
@@ -87,8 +89,8 @@ pub fn main() {
 // You will have to replace `part00` by `part01` in the `main` function in
 // `main.rs` to run this code.
 
-// **Exercise 01.1**: Write a funtion `vec_avg` that computes the average value of a `Vec<i32>`.
-// 
-// *Hint*: `vec.len()` returns the length of a vector `vec`.
+// **Exercise 01.1**: Write a funtion `vec_sum` that computes the sum of all values of a `Vec<i32>`.
+
+// **Exercise 01.2**: Write a function `vec_print` that takes a vector and prints all its elements.
 
 // [index](main.html) | [previous](part00.html) | [next](part02.html)