Added Ex. 4 arrays

This commit is contained in:
Dave Gauer 2021-01-03 20:34:26 -05:00
parent b3f74d9c30
commit 87541c0c8b
3 changed files with 34 additions and 2 deletions

31
04_arrays.zig Normal file
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@ -0,0 +1,31 @@
//
// Let's learn some array basics. Arrays literals are declared with:
//
// [size]<type>{ values };
//
// When Zig can infer the size of the array, you can use '_' for the
// size like so:
//
// [_]<type>{ values };
//
const std = @import("std");
pub fn main() void {
const some_primes = [_]u8{ 2, 3, 5, 7, 11, 13, 17, 19 };
// Array values are accessed using square bracket '[]' notation.
//
// (Note that when Zig can infer the type (u8 in this case) of a
// value, we don't have to manually specify it.)
//
const first = some_primes[0];
// Looks like we need to complete this expression:
const fourth = ???;
// Use '.len' to get the length of the array:
const length = some_primes.???;
std.debug.print("First: {}, Fourth: {}, Length: {}\n",
.{first, fourth, length});
}

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@ -60,7 +60,7 @@ Planned exercises:
* [x] Hello world (main needs to be public)
* [x] Importing standard library
* [x] Assignment
* [ ] Arrays
* [x] Arrays
* [ ] If
* [ ] While
* [ ] For

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@ -67,7 +67,8 @@ function check_it {
check_it 01_hello.zig "Hello world" "Note the error: the source file has a hint for fixing 'main'."
check_it 02_std.zig "Standard Library"
check_it 03_assignment.zig "55 314159 -11"
check_it 03_assignment.zig "55 314159 -11" "There are three mistakes in this one!"
check_it 04_arrays.zig "Fourth: 7, Length: 8" "There are two things to complete here."
echo
echo " __ __ _ "