add bit op

data/3.C语言高阶/3.位运算/5.位逻辑运算符/bit_op.json

+{
+    "type": "code_options",
+    "author": "幻灰龙",
+    "source": "bit_op.md"
+}
\ No newline at end of file

data/3.C语言高阶/3.位运算/5.位逻辑运算符/bit_op.md

+# 位逻辑运算
+
+下列错误的代码是？
+
+## 答案
+
+```c
+#include <stdio.h>
+#include <assert.h>
+
+int main(int argc, char** argv){
+    int i = 1;
+    assert(i<<1==4);
+    return 0;
+}
+
+```
+
+## 选项
+
+### 选项1
+
+```c
+#include <stdio.h>
+#include <assert.h>
+
+int main(int argc, char** argv){
+    int i = 2;
+    assert(i>>1==1);
+    return 0;
+}
+```
+
+### 选项2
+
+```c
+#include <stdio.h>
+#include <assert.h>
+
+int main(int argc, char** argv){
+    int i = 3;
+    assert((i&2)==2);
+    return 0;
+}
+```
+
+### 选项3
+
+```c
+#include <stdio.h>
+#include <assert.h>
+
+int main(int argc, char** argv){
+    int i = 1;
+    assert((i|2)==3);
+    return 0;
+}
+```
\ No newline at end of file

data/3.C语言高阶/3.位运算/5.位逻辑运算符/config.json

@@ -6,5 +6,7 @@
     "C语言"
   ],
   "children": [],
-  "export": []
+  "export": [
+      "bit_op.json"
+  ]
 }
\ No newline at end of file

data/3.C语言高阶/3.位运算/7.位字段/bit_field.md

-# 十六进制转换
+# 位字段(bit filed)
 
 利用位域，你能声明比字符宽度更小的成员，低至１位。假设机器字是8 bytes，下面的结构体大小是？