diff --git a/homework3/CMakeLists.txt b/homework3/CMakeLists.txt
new file mode 100644
index 0000000..7806f16
--- /dev/null
+++ b/homework3/CMakeLists.txt
@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.29)
+project(homework3)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(test1
+        Stack.h
+        Stack.cpp
+        test1.cpp)
diff --git a/homework3/Stack.cpp b/homework3/Stack.cpp
new file mode 100644
index 0000000..66c3450
--- /dev/null
+++ b/homework3/Stack.cpp
@@ -0,0 +1,41 @@
+#include "Stack.h"
+#include<iostream>
+
+using namespace std;
+
+bool isEmpty(stack &s) {
+    if (s.top == -1) {
+        return true;
+    }
+    return false;
+}
+
+bool isFull(stack &s) {
+    if (s.top == MAX_SIZE) {
+        return true;
+    }
+    return false;
+}
+
+void initStack(stack &s) {
+    s.top = -1;
+}
+
+
+void push(stack &s, int e) {
+    if (isFull(s)) {
+        cout << "此栈已满" << endl;
+        return;
+    }
+    s.top++;
+    s.data[s.top] = e;
+}
+
+int pop(stack &s) {
+    if (isEmpty(s)) {
+        cout << "此栈为空" << endl;
+        return NULL;
+    }
+    int e = s.data[s.top];
+    return e;
+}
diff --git a/homework3/Stack.h b/homework3/Stack.h
new file mode 100644
index 0000000..62a8fd5
--- /dev/null
+++ b/homework3/Stack.h
@@ -0,0 +1,21 @@
+#ifndef STACK_H
+#define STACK_H
+
+#define MAX_SIZE 100
+
+typedef struct stack {
+    int data[MAX_SIZE];
+    int top;
+} stack;
+
+bool isEmpty(stack &s);
+
+bool isFull(stack &s);
+
+void initStack(stack &s);
+
+void push(stack &s, int e);
+
+int pop(stack &s);
+
+#endif //STACK_H
diff --git a/homework3/test1.cpp b/homework3/test1.cpp
new file mode 100644
index 0000000..7a19bbc
--- /dev/null
+++ b/homework3/test1.cpp
@@ -0,0 +1,8 @@
+#include"Stack.h"
+#include<iostream>
+using namespace std;
+
+int main() {
+
+    return 0;
+}