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实验步骤1.c

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+#include <stdio.h>
+
+// 函数声明
+void displayMenu();
+
+int main() {
+    char input; // 用于存储用户输入的字符
+
+    while (1) {
+        displayMenu(); // 显示菜单
+
+        printf("Please enter your choice: ");
+        scanf(" %c", &input); // 读取用户输入
+
+        switch (input) {
+            case 'i':
+                printf("You are trying to Input info\n");
+                break;
+            case 'o':
+                printf("You are trying to Output info\n");
+                break;
+            case 'm':
+                printf("You are trying to Make things ordered\n");
+                break;
+            case 'q':
+                printf("You are about to Quit\n");
+                return 0; // 退出程序
+            default:
+                printf("Wrong input\n");
+                break;
+        }
+    }
+
+    return 0;
+}
+
+// 菜单显示函数
+void displayMenu() {
+    printf("\n");
+    printf("                              1.Input\n");
+    printf("                              2.Output\n");
+    printf("                              3.Order\n");
+    printf("                              4.Quit\n");
+    printf("\n");
+}
+