# 手机通讯录管理系统

names =[]
phones = []
while True:
print("\t\t\t\t=====欢迎使用手机通讯录管理系统=======")
print("\t\t\t\t1,添加姓名和手机号码")
print('\t\t\t\t2,删除姓名和手机号码')
print("\t\t\t\t3,根据姓名查找手机号码")
print('\t\t\t\t4,修改手机号码')
print("\t\t\t\t5,查询所有联系人")
print('\t\t\t\t6,退出系统')
print("\t\t\t\t=========================================")
i = int(input("请选择你想进行的操作："))
if i == 1:
name = input("\t请输入要添加的姓名：")
phone = input("\t请输入要添加的电话号码：")
while phone in phones:
phone = input("\t号码已经存在，请重新输入：")
else:
names.append(name)
phones.append(phone)
print("添加成功！")
elif i == 2:
name = input("\t请输入要删除的姓名：")
while name not in names:
name = input("\t姓名不存在，请重新输入：")
else:
index = names.index(name)
del names[index]
del phones[index]
print("删除成功！")
elif i == 3:
name = input("\t请输入想要查找的姓名：")
while name not in names:
name = input("\t姓名不存在，请重新输入：")
else:
index = names.index(name)
print("\t\t{} 的电话号码是 ：{}".format(name,phones[index]))
elif i == 4:
phone = input("\t请输入要修改的电话号码：")
while phone in phones:
new_phone = input("\t请输入新号码：")
while new_phone in phones:
new_phone = input("\t该号码已经存在，请重新输入：")
else:
index = phones.index(phone)
phones[index] = new_phone
print("修改成功！")
break
else:
phone = input("\t号码不存在，请重新输入：")
elif i == 5:
print("\t全部联系人：")
for i in range(len(names)):
print("\t\t",names[i],phones[i])
print("\t输出完毕！")
else:
print("谢谢使用！")
break