First commit

exercises/ch03/ex3_7.lua

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+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()