diff --git a/Code/dafen.c b/Code/dafen.c
new file mode 100644
index 0000000..890b3bb
--- /dev/null
+++ b/Code/dafen.c
@@ -0,0 +1,23 @@
+#include<stdio.h>
+
+int main()
+{
+	float a;
+	printf("请输入一个分数：\n");
+	scanf("%f", &a);
+	if(a <= 100 && a >= 90)
+	printf("A\n");
+	else if(a <= 90 && a >= 80)
+	printf("B\n");
+	else if(a < 80 && a >= 70)
+	printf("C\n");
+	else if(a < 70 && a >= 60)
+	printf("D\n");
+	else if(a < 60 && a >= 0)
+	printf("E\n");
+	else
+	printf("错误\n");
+
+
+	return 0;
+}
diff --git a/Code/output/test b/Code/output/test
index 6bf2ae0..d95bc4f 100644
Binary files a/Code/output/test and b/Code/output/test differ
diff --git a/Code/test.c b/Code/test.c
index 7c88c4c..34cf092 100644
--- a/Code/test.c
+++ b/Code/test.c
@@ -1,8 +1,12 @@
-#include<stdio.h>
+#include <stdio.h>
 
-int main()
+int main() 
 {
-	printf("hello world!\n");
+	
+	
+
+
+
 
 	return 0;
-}
+}
\ No newline at end of file