diff --git a/2207/C语言同步练习源码/6-预处理-1.c b/2207/C语言同步练习源码/6-预处理-1.c
new file mode 100644
index 0000000..32b4bf4
--- /dev/null
+++ b/2207/C语言同步练习源码/6-预处理-1.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#define MAXD(x, y) (x>y?x:y)
+
+int main(){
+    int a, b;
+    scanf("%d %d", &a, &b);
+    //(1>2?1:2) 将MAXD替换成三目运算符
+    printf("%d \n", MAXD(a, b));
+
+    return 0;
+}
\ No newline at end of file
diff --git a/2207/C语言同步练习答案.md b/2207/C语言同步练习答案.md
index 3c1f595..9cae841 100644
--- a/2207/C语言同步练习答案.md
+++ b/2207/C语言同步练习答案.md
@@ -870,7 +870,19 @@ int main(){
 
 ![image-20250227231302316](https://yp.smallkun.cn/markdown/image-20250227231302316.png!compress)
 
+```c
+#include <stdio.h>
+#define MAXD(x, y) (x>y?x:y)
 
+int main(){
+    int a, b;
+    scanf("%d %d", &a, &b);
+    //(1>2?1:2) 将MAXD替换成三目运算符
+    printf("%d \n", MAXD(a, b));
+
+    return 0;
+}
+```
 
 ### 预处理-2