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@ -1,2 +1,305 @@
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# SMAS
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# 录入学生信息
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# 录入学生的信息包括学号、姓名、英语成绩、python成绩、数学成绩、总成绩
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def input_info():
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findfile_info = open('infile.txt', 'r') # 以可读方式打开文件,用于检查主码唯一性
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line_info = findfile_info.readlines()
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infile_info = open('infile.txt', 'a') # 以追加的方式向文件中写入数据，如果文件不存在就创建一个文件
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flag = 'y'
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# 向文件中录入学生信息，每一个学生的信息单独占一行
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while flag == 'y' or flag == 'Y':
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n = 0
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stu_id = input("请输入学生学号（如2000300101）：")
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for line in line_info:
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if stu_id in line:
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n=n+1
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if n != 0:
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print("该学号已存在！！！")
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else:
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stu_name = input("请输入学生姓名：")
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stu_score_chi = input("请输入学生语文成绩：")
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stu_score_eng = input("请输入学生英语成绩：")
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stu_score_py = input("请输入学生Python成绩：")
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stu_score_math = input("请输入学生数学成绩：")
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stu_sum_score = int(stu_score_chi) + int(stu_score_eng) + int(stu_score_py) + int(stu_score_math)
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stu_info = stu_id + '\t' + stu_name + '\t' + stu_score_chi + '\t' + stu_score_eng + '\t' + stu_score_py + '\t' + stu_score_math + '\t' + str(
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stu_sum_score) + '\n'
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infile_info.write(stu_info)
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flag = input("是否继续添加学生信息？y/n")
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print("信息录入完毕！！！")
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infile_info.close()
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findfile_info.close()
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show_choose()
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# 查询学生信息
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# 查询时分为按学号和按姓名查找两种
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def find_info():
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flag = 'y'
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while flag == 'y' or flag == 'Y':
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n = 0
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m = 0 # 定义m，n是为了用作判断文件中是否有此人信息的标记
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findfile_info = open('infile.txt', 'r') # 以可读方式打开文件
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line_info = findfile_info.readlines()
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find_nid = input("按学号查找请输入1，按姓名查找请输入2：") # 查询方式分为按学号和按姓名
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if find_nid == '1':
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find_id = input('请输入学生学号：')
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for line in line_info:
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if find_id in line:
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#打印表头
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print("学号", end='\t')
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print("姓名", end='\t')
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print("语文成绩", end='\t')
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print("英语成绩", end='\t')
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print("Python成绩", end='\t')
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print("数学成绩", end='\t')
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print("总成绩", end='\t')
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print('\n')
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print(line)
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n = n + 1
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if n == 0:
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print("没有查询到学生信息，无数据显示！！！")
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if find_nid == '2':
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find_name = input('请输入学生姓名：')
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for line in line_info:
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if find_name in line:
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# 打印表头
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print("学号", end='\t')
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print("姓名", end='\t')
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print("语文成绩", end='\t')
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print("英语成绩", end='\t')
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print("Python成绩", end='\t')
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print("数学成绩", end='\t')
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print("总成绩", end='\t')
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print('\n')
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print(line)
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m = m + 1
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if m == 0:
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print("没有查询到学生信息，无数据显示！！！")
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findfile_info.close()
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flag = input("是否继续查询学生信息？y/n")
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show_choose()
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# 删除学生信息
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# 输入学号进行查找，查找到学生信息之后，对学生信息进行删除
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def del_info():
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flag = 'y'
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while flag == 'y' or flag == 'Y':
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n = 0 # 用以查无此人时的标记
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defile_info1 = open('infile.txt', 'r') # 以可读方式打开文件
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line_info = defile_info1.readlines() # 将文件的信息按行全部读取出来，此时line_info是一个列表，每一行是一个元素
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defile_info2 = open('infile.txt', 'w') # 以可写方式打开文件，用来将删除后的信息写入文件
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del_id = input("请输入要删除的学生的学号：")
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for line in line_info: # 如果要删除的学生学号在文件存储的信息中，就将后面的信息向前移动覆盖这条信息
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if del_id in line:
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continue
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defile_info2.write(line)
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n = n + 1
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if n == len(line_info):
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print("无此学生信息，请核对后再操作！！！")
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else:
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print("学号为{0}的学生信息已被删除！！！".format(del_id))
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defile_info1.close()
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defile_info2.close()
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flag = input("是否继续删除学习信息？y/n")
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show_choose()
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# 修改学生信息
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# 输入学号后，查询到学生信息之后，对学生信息进行修改
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def mod_info():
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flag = 'y'
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while flag == 'y' or flag == 'Y':
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n = 0 # 用以查无此人时的标记
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mod_id = input("请输入要修改的学生学号：")
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modfile_file1 = open('infile.txt', 'r') # 以可读方式打开文件，读取到line_info中，每一行就是一个列表的元素
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line_info = modfile_file1.readlines()
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modfile_file2 = open('infile.txt', 'w') # 用以写入修改后的数据
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for line in line_info: # 遍历列表
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if mod_id in line: # 如果修改的学生信息存在，就重新写入学生信息
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print("已找到学生，请修改信息！")
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mod_name = input("请输入姓名：")
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mod_score_chi = input("请输入语文成绩：")
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mod_score_eng = input("请输入英语成绩：")
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mod_score_py = input("请输入python成绩：")
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mod_score_math = input("请输入数学成绩：")
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mod_sum_score = int(mod_score_eng) + int(mod_score_py) + int(mod_score_math) + int(mod_score_chi)
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mod_stu_info = mod_id + '\t' + mod_name + '\t' + mod_score_chi + '\t' + mod_score_eng + '\t' + mod_score_py + '\t' + mod_score_math + '\t' + str(mod_sum_score) + '\n'
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modfile_file2.write(mod_stu_info)
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print("修改成功！！！")
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continue
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modfile_file2.write(line) # 由于w方式打开的文件重新后会覆盖原有数据，所以需要将原有数据写入
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n = n + 1
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if n == len(line_info):
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print("无此学生信息，请核对后再操作！！！")
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else:
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print("学号为{0}的学生信息已修改！！！".format(mod_id))
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modfile_file1.close()
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modfile_file2.close()
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flag = input("是否继续修改学习信息？y/n")
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show_choose()
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# 排序学生信息
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# 排序方式可选择升序和降序
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# 可选择按语文、英语、python、数学成绩以及总成绩进行排序
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def sort_info():
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flag = 'y'
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# 此方法用来排序，返回列表的2，3，4，5，6的元素，也就是分别依据语文、英语、python、数学、总成绩进行排序
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# 例如列表[['1','2','3'],['1','2','3'],['1','2','3']]
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# 则take_chi就是以每个列表的第三个元素为依据排序，也就是3，2，1
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def take_chi(elem):
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return int(elem[2])
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def take_eng(elem):
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return int(elem[3])
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def take_py(elem):
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return int(elem[4])
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def take_math(elem):
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return int(elem[5])
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def take_sum(elem):
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return int(elem[6])
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# 此方法用来进行排序后的输出操作
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def output_sort(sort_list):
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for m in sort_list:
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for n in m:
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print("%+10s" % n, end=' ')
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print()
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while flag == 'y' or flag == 'Y':
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sortfile_info = open('infile.txt', 'r') # 可读方式打开文件，并读取信息line_info中
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line_info = sortfile_info.readlines()
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# 定义列表，用来将读取出来的字符串信息，转化为列表
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# 例如['2000300101\t李小鹏\t80\t75\t86\t89\t330\n', '2000300102\t王大伟\t70\t85\t96\t99\t350\n']
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# 转化为[['2000300101', '李小鹏', '75', '86', '89', '330'], ['2000300102', '王大伟', '70', '85', '96', '99', '350']]
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lst = []
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for i in range(0, len(line_info)):
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lst.append('lst' + str(i))
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i = 0
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for line in line_info: # 遍历列表，将信息转化为单独的列表，并去掉\t和\n，方便接下来的排序比较
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line = line.replace('\n', '')
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lst[i] = line.split('\t')
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i = i + 1
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sort_up_down = input("请选择（0升序，1降序）：")
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print("1.按语文成绩排序，2.按英语成绩排序")
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print("3.按python成绩排序，4.按数学排序")
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print("5.按学生总成绩排序")
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sort_term = input("请选择：")
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# 打印表头
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print("学号", end='\t\t\t\t\t')
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print("姓名", end='\t\t')
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print("语文成绩", end='\t\t')
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print("英语成绩", end='\t\t')
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print("Python成绩", end='\t')
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print("数学成绩", end='\t\t')
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print("总成绩", end='\t\t')
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print('\n')
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if sort_up_down == '0': # 升序
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if sort_term == '1':
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lst.sort(key=take_chi, reverse=False)
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if sort_term == '2':
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lst.sort(key=take_eng, reverse=False)
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if sort_term == '3':
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lst.sort(key=take_py, reverse=False)
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if sort_term == '4':
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lst.sort(key=take_math, reverse=False)
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if sort_term == '5':
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lst.sort(key=take_sum, reverse=False)
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output_sort(lst)
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if sort_up_down == '1': # 降序
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if sort_term == '1':
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lst.sort(key=take_chi, reverse=True)
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if sort_term == '2':
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lst.sort(key=take_eng, reverse=True)
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if sort_term == '3':
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lst.sort(key=take_py, reverse=True)
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if sort_term == '4':
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lst.sort(key=take_math, reverse=True)
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if sort_term == '5':
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lst.sort(key=take_sum, reverse=True)
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output_sort(lst)
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flag = input("是否继续排序信息？y/n")
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show_choose()
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# 统计学生总数
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# 输出信息管理系统中有几个学生的信息
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def sum_info():
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sumfile_info = open('infile.txt', 'r')
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line_info = sumfile_info.readlines()
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sum_stu = len(line_info) # 写出列表中的元素个数
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print("一共有{0}名学生。".format(sum_stu))
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sumfile_info.close()
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show_choose()
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# 显示学生信息
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def show_info():
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print("学号", end='\t')
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print("姓名", end='\t')
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print("语文成绩", end='\t')
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print("英语成绩", end='\t')
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print("Python成绩", end='\t')
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print("数学成绩", end='\t')
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print("总成绩", end='\t')
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print('\n')
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showfile_info = open('infile.txt', 'r')
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line_info = showfile_info.readlines()
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for line in line_info: # 遍历列表，输出各个元素
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print(line)
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showfile_info.close()
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show_choose()
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def show_choose():
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print("==========================学生信息管理系统==========================")
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print()
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print("-----------------------------功能菜单------------------------------")
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print()
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print(" 1.录入学生信息")
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print(" 2.查找学生信息")
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print(" 3.删除学生信息")
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print(" 4.修改学生信息")
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print(" 5.排序学生信息")
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print(" 6.统计学生总数")
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print(" 7.显示学生信息")
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print(" 0.退出信息管理系统")
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print()
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print("------------------------------------------------------------------")
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def main():
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show_choose()
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choose_menu = input("请选择：")
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while choose_menu != '0':
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if choose_menu == '1':
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input_info()
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if choose_menu == '2':
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find_info()
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if choose_menu == '3':
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del_info()
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if choose_menu == '4':
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mod_info()
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if choose_menu == '5':
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sort_info()
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if choose_menu == '6':
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sum_info()
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if choose_menu == '7':
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show_info()
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choose_menu = input("请选择：")
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print("欢迎您再次使用！！！")
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main()
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