Added first quiz

This commit is contained in:
Dave Gauer 2021-01-06 17:41:53 -05:00
parent 30ef32e238
commit b9b89737fc
4 changed files with 50 additions and 13 deletions

View file

@ -24,7 +24,7 @@ pub fn main() void {
// Perhaps you noticed before that the print function takes two
// parameters. Now it will make more sense: the first parameter
// is a string. The string may contain placeholders '{}', and the
// second parameter is an anonymous struct (data structure)
// with values to be printed in place of the placeholders.
// second parameter is an "anonymous list literal" (don't worry
// about this for now!) with the values to be printed.
std.debug.print("{} {} {}\n", .{n, pi, negative_eleven});
}

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@ -1,26 +1,28 @@
//
// Let's learn some array basics. Arrays literals are declared with:
// Let's learn some array basics. Arrays are declared with:
//
// [size]<type>{ values };
// const foo [size]<type> = [size]<type>{ values };
//
// When Zig can infer the size of the array, you can use '_' for the
// size like so:
// size. You can also let Zig infer the type of the value so the
// declaration is much less verbose.
//
// [_]<type>{ values };
// const foo = [_]<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 some_primes = [_]u8{ 1, 3, 5, 7, 11, 13, 17, 19 };
// Individual values can be set with '[]' notation. Let's fix
// the first prime (it should be 2!):
some_primes[0] = 2;
// Individual values can also be accessed with '[]' notation.
const first = some_primes[0];
// Looks like we need to complete this expression:
// Looks like we need to complete this expression (like 'first'):
const fourth = ???;
// Use '.len' to get the length of the array:

34
08_quiz.zig Normal file
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@ -0,0 +1,34 @@
//
// Quiz time! Let's see if you can fix this whole program.
//
// This is meant to be challenging.
//
// Let the compiler tell you what's wrong.
//
// Start at the top.
//
const std = @import("std");
pub fn main() void {
// What is this nonsense? :-)
const letters = "YZhifg";
const x: u8 = 1;
// This is something you haven't seen before: declaring an array
// without putting anything in it. There is no error here:
var lang: [3]u8 = undefined;
// The following lines attempt to put 'Z', 'i', and 'g' into the
// 'lang' array we just created.
lang[0] = letters[x];
x = 3;
lang[???] = letters[x];
x = ???;
lang[2] = letters[???];
// We want to "Program in Zig!" of course:
std.debug.print("Program in {}!\n", .{lang});
}

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@ -72,6 +72,7 @@ check_it 04_arrays.zig "Fourth: 7, Length: 8" "There are two things to complete
check_it 05_arrays2.zig "LEET: 1337, Bits: 100110011001" "Fill in the two arrays."
check_it 06_strings.zig "d=d ha ha ha Major Tom" "Each '???' needs something filled in."
check_it 07_strings2.zig "Ziggy" "Please fix the lyrics!"
check_it 08_quiz.zig "Program in Zig" "See if you can fix the program!"
echo
echo " __ __ _ "