diff options
Diffstat (limited to 'exercises')
-rw-r--r-- | exercises/106_files.zig | 9 | ||||
-rw-r--r-- | exercises/107_files2.zig | 52 |
2 files changed, 56 insertions, 5 deletions
diff --git a/exercises/106_files.zig b/exercises/106_files.zig index b590679..78e6611 100644 --- a/exercises/106_files.zig +++ b/exercises/106_files.zig @@ -35,9 +35,7 @@ pub fn main() !void { // by doing nothing // // we want to catch error.PathAlreadyExists and do nothing - ??? => { - ???; - }, + ??? => {}, // if is any other unexpected error we just propagate it through else => return e, }; @@ -46,7 +44,8 @@ pub fn main() !void { // wait a minute // opening a directory might fail! // what should we do here? - const output_dir: std.fs.Dir = cwd.openDir("output", .{}); + var output_dir: std.fs.Dir = cwd.openDir("output", .{}); + defer output_dir.close(); // we try to open the file `zigling.txt`, // and propagate the error up if there are any errors @@ -60,7 +59,7 @@ pub fn main() !void { // !you are not allow to switch this two lines to before file closing line! const byte_written = try file.write("It's zigling time!"); - std.debug.print("Succefully wrote {} bytes.\n", .{byte_written}); + std.debug.print("Successfully wrote {} bytes.\n", .{byte_written}); } // to check if you actually write to the file, you can either, // 1. open the file on your text editor, or diff --git a/exercises/107_files2.zig b/exercises/107_files2.zig new file mode 100644 index 0000000..18d59ef --- /dev/null +++ b/exercises/107_files2.zig @@ -0,0 +1,52 @@ +// +// Prerequisite : +// - exercise/106_files.zig, or +// - create a file {project_root}/output/zigling.txt +// with content `It's zigling time!`(18 byte total) +// +// Now there no point in writing to a file if we don't read from it am I right? +// let's wrote a program to read the content of the file that we just created. +// +// I am assuming you've created the appropriate files for this to work. +// +// Alright, bud, lean in close here's the game plan. +// - First, we open the {project_root}/output/ directory +// - Secondly, we open file `zigling.txt` in that directory +// - then, we initalize an array of character with all letter 'A', and print it +// - Afte that, we read the content of the file to the array +// - Finally, we print out the read content + +const std = @import("std"); + +pub fn main() !void { + // Get the current working directory + const cwd = std.fs.cwd(); + + // try to open ./output assuming you did your 106_files exercise + var output_dir = try cwd.openDir("output", .{}); + defer output_dir.close(); + + // try to open the file + const file = try output_dir.openFile("zigling.txt", .{}); + defer file.close(); + + // initalize an array of u8 with all letter 'A'. + // we need to pick a size of the array, 64 seems like a good number. + // fix the initalization below + var content = ['A']*64; + // this should print out : `AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA` + std.debug.print("{s}\n", .{content}); + + // okay, seem like threat of violence is not the answer in this case + // can you go here to find a way to read the content ? + // https://ziglang.org/documentation/master/std/#std.fs.File + // hint: you might find two answer that are both vaild in this case + const byte_read = zig_read_the_file_or_i_will_fight_you(&content); + + // Woah, too screamy, I know you're excited for zigling time but tone it down a bit + // Can you print only what we read from the file ? + std.debug.print("Successfully Read {} byte: {s}\n", .{ + byte_read, + content, // change this line only + }); +} |