1 files changed, 14 insertions, 6 deletions

diff --git a/src/main.zig b/src/main.zig
index 496d14f..341bc62 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -2,7 +2,7 @@ const SudokuSolver = struct {
     const join = std.simd.join;
     // Each cell exists in memory three times.
     // This makes it easy to compare a guess against all relevant cells simultaneously.
-    rows: [9]@Vector(9, u8),
+   rows: [9]@Vector(9, u8),
     cols: [9]@Vector(9, u8),
     boxes: [9]@Vector(9, u8),
 
@@ -116,7 +116,7 @@ const SudokuSolver = struct {
         return (row % 3) * 3 + col % 3;
     }
 
-    fn display(self: SudokuSolver, writer: std.io.AnyWriter) !void {
+    fn display(self: SudokuSolver, writer: *std.Io.Writer) !void {
         for (self.rows, 0..) |row, i| {
             // Can't loop over row directly?
             for (@as([9]u8, row), 0..) |cell, j| {
@@ -130,18 +130,24 @@ const SudokuSolver = struct {
                 try writer.print("{s}\n", .{"-" ** 21});
             }
         }
+        try writer.flush();
     }
 };
 
 pub fn main() !void {
     var board: [9][9]u8 = undefined;
 
-    const stdout = std.io.getStdOut().writer().any();
-    const stdin = std.io.getStdIn().reader().any();
+    var stdout_buffer: [1024]u8 = undefined;
+    var stdout_writer = std.fs.File.stdout().writer(&stdout_buffer);
+    const stdout = &stdout_writer.interface;
+
+    var stdin_buffer: [1024]u8 = undefined;
+    var stdin_reader = std.fs.File.stdin().reader(&stdin_buffer);
+    const stdin = &stdin_reader.interface;
 
     for (0..9) |row| {
         for (0..9) |col| {
-            const byte = try stdin.readByte();
+            const byte = try stdin.takeByte();
             board[row][col] = try std.fmt.charToDigit(byte, 10);
         }
     }
@@ -228,7 +234,9 @@ test "Solve easy board" {
 
     var solver: SudokuSolver = SudokuSolver.init(board) catch unreachable;
 
-    const stderr = std.io.getStdErr().writer().any();
+    var stderr_buffer: [1024]u8 = undefined;
+    var stderr_writer = std.fs.File.stderr().writer(&stderr_buffer);
+    const stderr = &stderr_writer.interface;
     std.debug.print("input:\n", .{});
     try solver.display(stderr);
     std.debug.print("output:\n", .{});