diff options
| -rw-r--r-- | README.md | 4 | ||||
| -rw-r--r-- | build.zig | 6 | ||||
| -rw-r--r-- | exercises/095_for_loops.zig | 64 | ||||
| -rw-r--r-- | patches/patches/095_for_loops.patch | 4 |
4 files changed, 75 insertions, 3 deletions
@@ -42,7 +42,7 @@ Verify the installation and build number of `zig` like so: ```bash $ zig version -0.11.0-dev.1711+xxxxxxxxx +0.11.0-dev.1844+xxxxxxxxx ``` Clone this repository with Git: @@ -82,7 +82,7 @@ about input: ### Version Changes -Version-0.11.0-dev.1711+xxxxxxxxx +Version-0.11.0-dev.1844+xxxxxxxxx * *2023-02-21* zig 0.11.0-dev.1711 - changes in `for loops` - new: Multi-Object For-Loops + Struct-of-Arrays * *2023-02-12* zig 0.11.0-dev.1638 - changes in `std.Build` cache_root now returns a directory struct * *2023-02-04* zig 0.11.0-dev.1568 - changes in `std.Build` (combine `std.build` and `std.build.Builder` into `std.Build`) @@ -8,7 +8,7 @@ const print = std.debug.print; // When changing this version, be sure to also update README.md in two places: // 1) Getting Started // 2) Version Changes -const needed_version = std.SemanticVersion.parse("0.11.0-dev.1711") catch unreachable; +const needed_version = std.SemanticVersion.parse("0.11.0-dev.1844") catch unreachable; const Exercise = struct { /// main_file must have the format key_name.zig. @@ -480,6 +480,10 @@ const exercises = [_]Exercise{ .C = true, }, .{ + .main_file = "095_for_loops.zig", + .output = "1 2 4 7 8 11 13 14 16 17 19", + }, + .{ .main_file = "999_the_end.zig", .output = "\nThis is the end for now!\nWe hope you had fun and were able to learn a lot, so visit us again when the next exercises are available.", }, diff --git a/exercises/095_for_loops.zig b/exercises/095_for_loops.zig new file mode 100644 index 0000000..b437946 --- /dev/null +++ b/exercises/095_for_loops.zig @@ -0,0 +1,64 @@ +// +// The Zig language is in rapid development and continuously improves +// the language constructs steadily. +// +// Since version 0.11, the "for-loops" widely used in other languages +// such as C, e.g. "for (int i = 0; i < 10..." can now also be formed +// similarly in Zig, which previously required a "while" construct. +// Similar in this case actually means better, just as Zig generally +// tries to make everything simple and "better". +// +// These new "for-loops" look like the following in Zig: +// +// for (0..10) |idx| { +// // In this case 'idx' takes all values from 0 to 9. +// } +// +// This is really simple and can replace the previous, somewhat bulky: +// +// var idx: usize = 0; +// while (idx < 10) : (idx += 1) { +// // Again, idx takes all values from 0 to 9. +// } +// +// This would also simplify exercise 13, for example. +// The best way to try this out is to use this exercise, which in the +// original looks like this: +// +// ... +// var n: u32 = 1; +// +// // I want to print every number between 1 and 20 that is NOT +// // divisible by 3 or 5. +// while (n <= 20) : (n += 1) { +// // The '%' symbol is the "modulo" operator and it +// // returns the remainder after division. +// if (n % 3 == 0) continue; +// if (n % 5 == 0) continue; +// std.debug.print("{} ", .{n}); +// } +// ... +// +const std = @import("std"); + +// And now with the new "for-loop". +pub fn main() void { + + // I want to print every number between 1 and 20 that is NOT + // divisible by 3 or 5. + for (???) |n| { + + // The '%' symbol is the "modulo" operator and it + // returns the remainder after division. + if (n % 3 == 0) continue; + if (n % 5 == 0) continue; + std.debug.print("{} ", .{n}); + } + + std.debug.print("\n", .{}); +} + +// Is actually a little easier. The interesting thing here is that the other +// previous 'while' exercises (11,12, 14) cannot be simplified by this +// new "for-loop". Therefore it is good to be able to use both variations +// accordingly. diff --git a/patches/patches/095_for_loops.patch b/patches/patches/095_for_loops.patch new file mode 100644 index 0000000..5eaecef --- /dev/null +++ b/patches/patches/095_for_loops.patch @@ -0,0 +1,4 @@ +49c49 +< for (???) |n| { +--- +> for (1..21) |n| { |