First commit

exercises/ch03/ex3_6.lua

@@ -0,0 +1,25 @@
+function Calculate_volume(height, angle)
+    local r = math.tan(angle) * height
+    return 1/3 * math.pi * r^2 * height
+end
+
+function Tests()
+    -- height, angle
+    local cases = {
+        { 4.03, 3.55 },
+        { 308, 380 },
+        { 0.394, 0.826 }
+    }
+
+    for i = 1, #cases do
+        local case = cases[i]
+        local height = case[1]
+        local angle = case[2]
+
+        local volume = Calculate_volume(height, angle)
+
+        print(string.format("height: %f, angle: %f, volume: %f", height, angle, volume))
+    end
+end
+
+Tests()

exercises/ch03/ex3_7.lua

@@ -0,0 +1,14 @@
+local function random_normal()
+    local u = math.random()
+    local v = math.random()
+    return math.sqrt(-2 * math.log(u, math.exp(1))) * math.cos(2 * math.pi * v)
+end
+
+local function generate()
+    for _ = 0, 10 do
+        local value = random_normal()
+        print(value)
+    end
+end
+
+generate()