From 369ac0c4035791772433b8c966b2ab45aa8d4b3d Mon Sep 17 00:00:00 2001
From: Tink_Y <31891223+tink2123@users.noreply.github.com>
Date: Sat, 29 Dec 2018 15:45:06 +0800
Subject: [PATCH] add missed lines for programming guide (#517)

* fixed missed lines for programming guide

* Update programming_guide.md
---
 .../beginners_guide/programming_guide/programming_guide.md     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/doc/fluid/beginners_guide/programming_guide/programming_guide.md b/doc/fluid/beginners_guide/programming_guide/programming_guide.md
index b17414a6f..14fbe554e 100644
--- a/doc/fluid/beginners_guide/programming_guide/programming_guide.md
+++ b/doc/fluid/beginners_guide/programming_guide/programming_guide.md
@@ -384,6 +384,9 @@ outs = exe.run(
     #定义损失函数
     cost = fluid.layers.square_error_cost(input=y_predict,label=y)
     avg_cost = fluid.layers.mean(cost)
+    #定义优化方法
+    sgd_optimizer = fluid.optimizer.SGD(learning_rate=0.01)
+    sgd_optimizer.minimize(avg_cost)
     #参数初始化
     cpu = fluid.core.CPUPlace()
     exe = fluid.Executor(cpu)
-- 
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