上次我写了一个python的成绩系统,用vscode写的，没发布，（因为bug有点多）最近学了try语句，就改了改，发在这里，有需要的自取
'''
程序：成绩单2.0版
作者：夏宇彬
编写日期：2021年7月14日
'''
class Student:
def __init__(self):
self.name = ""
self.ID = ""
self.score1 = 0
self.score2 = 0
self.score3 = 0
def getSum(self):
self.total = self.score1 + self.score2 + self.score3
def printStudent(self):
print(self.ID,"\t",self.name,"\t",self.score1,"\t",self.score2,"\t",self.score3,"\t",self.total)
def showInfo():
print("-" * 30)
print(" 学生成绩系统 ")
print(" 1.添加学生的信息")
print(" 2.删除学生的信息")
print(" 3.修改学生的信息")
print(" 4.查询学生的信息")
print(" 5.列出所有学生的信息")
print(" 6.退出系统")
print("-" * 30)
def hasRecord(sList,sID):
result = -1
i = 0
for temp in sList:
if temp.ID == sID:
result = i
def getScore(subject,action):
try:
score=float(input("请输入"+subject+"成绩："))
except:
print ("输入的不是数字，"+action+"失败！")
return -1
if score <= 100 and score >= 0 :
return score
else:
print ("输入的"+subject+"成绩有错误,"+action+"失败！")
return -1
def updateStudent(student):
while True:
try:
alterNum = int(input(" 1.修改姓名\n 2.修改学号 \n 3.修改语文成绩 \n 4.修改数学成绩 \n 5.修改英语成绩 \n 6.退出修改 \n"))
except:
print("输入有误，。请输入编号1到6")
continue
if alterNum == 1:
newName = input("请输入更改后的姓名")
student.name = newName
print("姓名修改成功")
break
elif alterNum == 2:
newId = input("请输入更改后的学号")
newIndex = hasRecord(studentList,newId)
if newIndex > -1:
print("输入学号不可重复，修改失败！")
else:
student.ID = newId
print("学号修改成功")
break
elif alterNum == 3:
score1 = getScore("语文", "修改")
if score1 > -1:
student.score1 = score1
student.getSum()
print("语文成绩修改成功！")
break
elif alterNum == 4:
score2 = getScore("数学", "修改")
if score2 > -1:
student.score2 = score2
student.getSum()
print("数学成绩修改成功！")
break
elif alterNum == 5:
score3 = getScore("英语", "修改")
if score3 > -1:
student.score3 = score3
student.getSum()
print("英语成绩修改成功！")
break
elif alterNum == 6:
break
else:
print("输入错误请重新输入")
WriteToText(studentList)
def LoadFromText(sList):
print("加载已有数据......")
try:
txtFile = open("students.txt","r")
while True:
line = txtFile.readline()
if not line or line.strip()=="":
break
else:
s = line.split(" ")
stu = Student()
stu.ID = s[0]
stu.name = s[1]
stu.score1 = float(s[2])
stu.score2 = float(s[3])
stu.score3 = float(s[4])
stu.total = float(s[5])
sList.append(stu)
except:
txtFile = open("students.txt","w")
txtFile.close()
print("加载成功！")
def AddToText(stu):
txtFile = open("students.txt","a")
txtFile.write(stu.ID)
txtFile.write(" ")
txtFile.write(stu.name)
txtFile.write(" ")
txtFile.write(str(stu.score1))
txtFile.write(" ")
txtFile.write(str(stu.score2))
txtFile.write(" ")
txtFile.write(str(stu.score3))
txtFile.write(" ")
txtFile.write(str(stu.total))
txtFile.write("\n")
txtFile.close()
def WriteToText(sList):
txtFile = open("students.txt","w")
for stu in sList:
txtFile.write(stu.ID)
txtFile.write(" ")
txtFile.write(stu.name)
txtFile.write(" ")
txtFile.write(str(stu.score1))
txtFile.write(" ")
txtFile.write(str(stu.score2))
txtFile.write(" ")
txtFile.write(str(stu.score3))
txtFile.write(" ")
txtFile.write(str(stu.total))
txtFile.write("\n")
txtFile.close()
studentList = []
LoadFromText(studentList)
while True:
showInfo()
try:
key = int(input("请选择功能（输入序号1到6）："))
except:
print("您的输入有误，请输入序号1到6")
continue
if key == 1:
print("您选择了添加学生信息功能")
name = input("请输入姓名：")
stuId = input("请输入学号（不可重复）：")
index = hasRecord(studentList, stuId)
if index >-1:
print("输入学号重复，添加失败！")
continue
else:
newStudent = Student()
newStudent.name = name
newStudent.ID = stuId
score1 = getScore("语文", "添加")
if score1 > -1:
newStudent.score1 = score1
else:
continue
score2 = getScore("数学", "添加")
if score2 > -1:
newStudent.score2 = score2
else:
continue
score3 = getScore("英语", "添加")
if score3 > -1:
newStudent.score3 = score3
else:
continue
newStudent.getSum()
studentList.append(newStudent)
print(newStudent.name +"的成绩录入成功！")
elif key == 2:
print("您选择了删除学生信息功能")
stuId = input("请输入要删除的学号：")
index = hasRecord(studentList, stuId)
if index > -1:
del studentList[index]
WriteToText(studentList)
print("删除成功！")
else:
print("没有此学生学号，删除失败！")
elif key == 3:
print("您选择了修改学生信息功能")
stuId = input("请输入你要修改学生的学号：")
index = hasRecord(studentList, stuId)
if index > -1:
print("没有此学号，修改失败！")
else:
temp = studentList[index]
updateStudent(temp)
elif key == 4:
print("您选择了查询学生信息功能")
stuId = input("请输入你要查询学生的学号：")
index = hasRecord(studentList, stuId)
if index == -1:
print("没有此学生学号，查询失败！")
else:
temp = studentList[index]
print("学号\t姓名\t语文\t数学\t英语\t总分")
temp.printStudent()
elif key == 5:
print("接下来遍历所有的学生信息...")
print("学号\t姓名\t语文\t数学\t英语\t总分")
for temp in studentList:
temp.printStudent()
elif key == 6:
quitConfirm = input("确认要退出系统吗（Y或N）？")
if quitConfirm.upper() == "Y":
print("欢迎使用本系统，谢谢")
break
else:
print("您输入有误，请重新输入")本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。
