From 467d7c540b3d6826df8d41f0644894babb6d9da8 Mon Sep 17 00:00:00 2001
From: zeekling <lingzhaohui@zeekling.cn>
Date: Mon, 13 Jul 2020 20:07:29 +0800
Subject: [PATCH] s_tag.c

---
 c_expert/chapter3/s_tag.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 c_expert/chapter3/s_tag.c

diff --git a/c_expert/chapter3/s_tag.c b/c_expert/chapter3/s_tag.c
new file mode 100644
index 0000000..8d3b1e0
--- /dev/null
+++ b/c_expert/chapter3/s_tag.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+
+#define SIZE 3
+
+struct s_tag {
+	int a [SIZE];
+};
+
+struct s_tag orange, lime, lemon;
+
+struct s_tag twofold (struct s_tag s) {
+	int j;
+	for ( j = 0; j < SIZE; j++ )
+	{
+		s.a[j] *= 2;
+	}
+	return s;
+}
+
+int main()
+{
+	int i;
+	for ( i = 0; i< SIZE; i++ )
+	{
+		lime.a[i] = 1;
+	}
+	lemon = twofold(lime);
+	orange = lemon;
+	for ( i = 0; i< SIZE; i++ )
+	{
+		printf("lime.a[%d]=%d\n", i, lime.a[i]);
+		printf("lemon.a[%d]=%d\n", i, lemon.a[i]);
+		printf("orange.a[%d]=%d\n", i, orange.a[i]);
+	}
+	return 0;
+}