# def tixing(a,b,h): # return (a+b)*h/2 # a = int(input('请输入上边长:')) # b = int(input('请输入下边长:')) # h = int(input('请输入高度:')) # jieguo = tixing(a,b,h) # print((a+b)*h/2) # def panduan(num_4): # if num_4%400 ==0 or num_4%4==0 and num_4%100!=0: # return "为闰年" # else: # return "不是闰年" # # if __name__ == '__main__': # nianfen = int(input("请输入年份:")) # print(panduan(nianfen)) # def print_info(): # print("++++++++++++++++++++++") # print("欢迎来到学生管理系统") # print("1.添加学生信息") # print("2.修改学生信息") # print("3.查看学生信息") # print("4.删除学生信息") # print("5.显示所有学生信息") # print("6.退出") # print("++++++++++++++++++++++") # student_info = [] # # def add_info(): # global student_info # id = input("请输入学生的id:") # name = input("请输入学生的姓名:") # age = input("请输入学生的年龄:") # sex = input("请输入学生的性别:") # dict_info = {} # dict_info["id"] = id # dict_info["name"] = name # dict_info["age"] = age # dict_info["sex"] = sex # student_info.append(dict_info) # print(student_info) # # # def xiu_info(): # global student_info # num_3 = int(input("请输入需要修改的学生的id")) # new_name = input("请输入新的名字 (回车不修改)") # student_info[num_3-1]["name"] = new_name # new_age = input("请输入新的年龄 (回车不修改)") # student_info[num_3-1]["age"] = new_age # new_sex = input("请输入新的性别 (回车不修改)") # student_info[num_3-1]["sex"] = new_sex # print(student_info) # # # def show_info(): # global student_info # num_4 = int(input("请输入要查询信息的学生id")) # print(student_info[num_4-1]) # # # def del_info(): # global student_info # num_5 = int(input("请输入要删除信息的学生id")) # del student_info[num_5-1] # all_info() # # # def all_info(): # print(student_info)