docs: 2026-03-17作业+PPT

2026-03-17/2026-03-17_hw_2.py

@@ -0,0 +1,18 @@
+# 物流计费系统
+
+d = {"01": (13, 3), "02": (12, 2), "03": [14, 4]}
+area = input("请输入地区编号: ")
+weight = 0
+while True:
+    try:
+        weight = int(input("请输入重量(kg): "))
+        break
+    except ValueError:
+        print("请输入整数...")
+if area not in d:
+    print("地区编号不正确，请输入正确的地区编号")
+else:
+    (p1, p2) = d[area]
+    if weight < 2:
+        weight = 2
+    print("价格是: " + str(p1 + (weight - 2) * p2))