From 276641b9c643d5edd6ce53ee6428b6d2e7c45e2a Mon Sep 17 00:00:00 2001
From: Riccardo Forese <forese.riccardo@gmail.com>
Date: Mon, 2 Feb 2026 17:25:04 +0100
Subject: [PATCH] Aggiunta della struttura neuron e tensor

---
 src/main.zig   | 41 ++++++++++++++++++++++-------------------
 src/neuron.zig | 43 +++++++++++++++++++++++++++++++++++++++++++
 src/tensor.zig | 28 ++++++++++++++++++++++++++++
 3 files changed, 93 insertions(+), 19 deletions(-)
 create mode 100644 src/neuron.zig
 create mode 100644 src/tensor.zig

diff --git a/src/main.zig b/src/main.zig
index 25b067e..240cf72 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,25 +1,28 @@
 const std = @import("std");
-const AI_Zig = @import("AI_Zig");
+const Neuron = @import("neuron.zig").Neuron;
+const Tensor = @import("tensor.zig").Tensor;
 
 pub fn main() !void {
-    std.debug.print("All your {s} are belong to us.\n", .{"codebase"});
-    try AI_Zig.bufferedPrint();
-}
+    // 1. Setup dell'allocatore per la memoria
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    const allocator = gpa.allocator();
+    defer _ = gpa.deinit();
 
-test "simple test" {
-    const gpa = std.testing.allocator;
-    var list: std.ArrayList(i32) = .empty;
-    defer list.deinit(gpa);
-    try list.append(gpa, 42);
-    try std.testing.expectEqual(@as(i32, 42), list.pop());
-}
+    // 2. Creiamo un neurone con 3 ingressi
+    var my_neuron = try Neuron.init(allocator, 3);
+    defer my_neuron.deinit();
 
-test "fuzz example" {
-    const Context = struct {
-        fn testOne(context: @This(), input: []const u8) anyerror!void {
-            _ = context;
-            try std.testing.expect(!std.mem.eql(u8, "canyoufindme", input));
-        }
-    };
-    try std.testing.fuzz(Context{}, Context.testOne, .{});
+    // 3. Creiamo dei dati di input di esempio (es. [1.0, 0.5, -2.0])
+    var inputs = try Tensor.init(allocator, &[_]usize{3});
+    defer inputs.deinit();
+    inputs.data[0] = 1.0;
+    inputs.data[1] = 0.5;
+    inputs.data[2] = -2.0;
+
+    // 4. Eseguiamo il calcolo
+    const output = my_neuron.forward(inputs);
+
+    std.debug.print("Input: {any}\n", .{inputs.data});
+    std.debug.print("Pesi del neurone: {any}\n", .{my_neuron.weights.data});
+    std.debug.print("Risultato (Output): {d:.4}\n", .{output});
 }
diff --git a/src/neuron.zig b/src/neuron.zig
new file mode 100644
index 0000000..12648cd
--- /dev/null
+++ b/src/neuron.zig
@@ -0,0 +1,43 @@
+const std = @import("std");
+const Tensor = @import("tensor.zig").Tensor;
+
+pub const Neuron = struct {
+    weights: Tensor,
+    bias: f32,
+
+    pub fn init(allocator: std.mem.Allocator, input_size: usize) !Neuron {
+        const weights = try Tensor.init(allocator, &[_]usize{input_size});
+
+        var seed: u64 = undefined;
+        try std.posix.getrandom(std.mem.asBytes(&seed));
+
+        var prng = std.Random.DefaultPrng.init(seed);
+        const rand = prng.random();
+
+        for (weights.data) |*w| {
+            w.* = rand.float(f32) * 2.0 - 1.0;
+        }
+
+        return Neuron{
+            .weights = weights,
+            .bias = 0.0,
+        };
+    }
+
+    pub fn deinit(self: *Neuron) void {
+        self.weights.deinit();
+    }
+
+    pub fn forward(self: *Neuron, inputs: Tensor) f32 {
+        std.debug.assert(inputs.data.len == self.weights.data.len);
+
+        var sum: f32 = 0.0;
+        for (inputs.data, self.weights.data) |x, w| {
+            sum += x * w;
+        }
+
+        const z = sum + self.bias;
+
+        return if (z > 0) z else 0;
+    }
+};
diff --git a/src/tensor.zig b/src/tensor.zig
new file mode 100644
index 0000000..e6aaf40
--- /dev/null
+++ b/src/tensor.zig
@@ -0,0 +1,28 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+pub const Tensor = struct {
+    data: []f32,
+    shape: []const usize,
+    allocator: Allocator,
+
+    pub fn init(allocator: Allocator, shape: []const usize) !Tensor {
+        var size: usize = 1;
+        for (shape) |dim| {
+            size *= dim;
+        }
+
+        const data = try allocator.alloc(f32, size);
+        @memset(data, 0);
+
+        return Tensor{
+            .data = data,
+            .shape = shape,
+            .allocator = allocator,
+        };
+    }
+
+    pub fn deinit(self: *Tensor) void {
+        self.allocator.free(self.data);
+    }
+};