diff --git a/201816040201/Ex07_13.cpp b/201816040201/Ex07_13.cpp
new file mode 100644
index 0000000..b75b68e
--- /dev/null
+++ b/201816040201/Ex07_13.cpp
@@ -0,0 +1,41 @@
+#include <iostream>
+
+#include<array>
+
+using namespace std;
+
+
+int main()
+{
+
+	array< int, 20> a1, a2;///a1为原始数组，a2为去重后的数组
+	int sum = 0;
+	
+	for (int i = 0; i < 20; i++)
+	{
+		int x;
+		cin >> x;
+		if (x >= 10 && x <= 100)//数据合法
+			a1[sum++] = x;;//输入原始数据
+	}
+	int cnt = 0;
+	for (int i = 0; i < sum; i++)//去重
+	{
+
+		int flag = 0;
+		for (int j = i+1; j < sum; j++)
+		{
+			if (a1[i] == a1[j])
+				flag = 1;
+		}
+		if (!flag)
+			a2[cnt++] = a1[i];
+
+	}
+	cout << cnt << endl;//一共有多少不同的数
+	for (int i = 0; i < cnt; i++)//输出去重后的数组
+		cout << a2[i] << ' ';
+
+	return 0;
+
+}