save project

yg.py

@@ -5,6 +5,20 @@ def new_input():
         if unit=="sb":
             break
         else:
-            total.append(unit)
-    print(total)
-new_input()
+            try:
+               unit=int(unit)
+            except:
+               print("请重新输入")
+            else:
+                total.append(unit)
+    return total
+
+def sum(money):
+    count=0
+    for i in money:
+        count=count+i
+    return count
+
+price=new_input()
+pay=sum(price)
+print("一共"+str(pay)+"元！怎么付")
\ No newline at end of file