Update

ui_helper.cpp

@@ -0,0 +1,40 @@
+#include "ui_helper.h"
+#include <Windows.h>
+#include <cstdlib>
+#include <cstdio>
+
+void ClearScreen()
+{
+    system("cls");
+}
+
+void ClearInput()
+{
+    int c;
+    while ((c = getchar()) != '\n' && c != EOF);
+}
+
+void WaitPause()
+{
+    system("pause");
+}
+
+void title(const std::string& xtitle)
+{
+    ClearScreen();
+    printf("==============================\n");
+    printf("%s\n", xtitle.c_str());
+    printf("==============================\n");
+}
+
+int GetChoice(int max_id)
+{
+    int x;
+    while (scanf("%d", &x) != 1 || x<1 || x>max_id)
+    {
+        printf("输入有误. 应为在1~%d范围内的数字. 请重试.\n", max_id);
+        ClearInput();
+    }
+    ClearInput();
+    return x;
+}

ui_helper.h

@@ -0,0 +1,11 @@
+#pragma once
+#include <string>
+
+void ClearScreen();
+void ClearInput();
+
+void WaitPause();
+
+void title(const std::string& xtitle);
+
+int GetChoice(int max_id);