attemps from before

2021/day2/day2.zig

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+const input = @embedFile("input2");
+const std = @import("std");
+
+pub fn main() !void{
+
+    var horizontal: usize = 0;
+    var depth: usize = 0;
+    var aim: usize = 0;
+
+    var iter = std.mem.tokenize(u8, input, "\n "); // You can split on 2 delimeters, by adding them to the string
+
+    while(iter.next())|direction|{
+        var value = try std.fmt.parseInt(usize, iter.next().?, 10);
+
+        if(std.mem.eql(u8, direction, "up")){ aim -= value; }
+        if(std.mem.eql(u8, direction, "down")){ aim += value; }
+        if(std.mem.eql(u8, direction, "forward")){ 
+            horizontal += value; 
+            depth += (aim * value);
+        }
+    }
+
+    std.debug.print("result: {}", .{depth * horizontal});
+}
+
+test "Part 1"{
+
+    var horizontal: usize = 0;
+    var depth: usize = 0;
+
+    var iter = std.mem.tokenize(u8, input, "\n "); // You can split on 2 delimeters, by adding them to the string
+
+    while(iter.next())|direction|{
+        var value = try std.fmt.parseInt(usize, iter.next().?, 10);
+
+        if(std.mem.eql(u8, direction, "forward")){ horizontal += value; }
+        if(std.mem.eql(u8, direction, "up")){ depth -= value; }
+        if(std.mem.eql(u8, direction, "down")){ depth += value; }
+
+    }
+
+
+    std.testing.expect(1762050 == (depth * horizontal));
+}
+
+
+
+
+test "part 2"{
+
+    var horizontal: usize = 0;
+    var depth: usize = 0;
+    var aim: usize = 0;
+
+    var iter = std.mem.tokenize(u8, input, "\n "); // You can split on 2 delimeters, by adding them to the string
+
+    //First token is the direction
+    while(iter.next())|direction|{
+        var value = try std.fmt.parseInt(usize, iter.next().?, 10);
+
+        if(std.mem.eql(u8, direction, "up")){   aim -= value; }
+        if(std.mem.eql(u8, direction, "down")){ aim += value; }
+        if(std.mem.eql(u8, direction, "forward")){ 
+            horizontal  += value; 
+            depth       += (aim * value);
+        }
+    }
+
+    std.testing.expect(1855892637 == (depth * horizontal));
+}

2021/day2/input2.test

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+forward 5
+down 5
+forward 8
+up 3
+down 8
+forward 2