save project

diy.py

-# 写入同学们的捐赠明细：
-new = ""
-with open(r'C:\Users\Administrator\Desktop\test.txt','r',encoding='utf-8') as file:
-    for a in file:
-        a = a.replace('1','3')
-        print(a)
\ No newline at end of file
+a=input()
+ls=[]
+ls.append(a)
+while a:
+    a=input()
+    ls.append(a.split())
+ls.pop(-1)
+print(ls)
+sum=0
+women=0
+for i in ls:
+    sum=sum+int(i[1])
+print("平均年龄是{:.2f}".format(sum))
\ No newline at end of file