控制台下的学生成绩标准管理系统.docx

namespace Alex_11_30_Practice public struct Student/定义结构体关键 /将以下字段保留在结构体中 public int number; public string Name; public float num1; public float num2; public float num3; class Program public static int count = 0;/定义下标计数器 static void Main(string args) /首先打印出程序界面打印 Student stu = new Student50;/实例化一个结构体50数组 bool b = true; do Console.WriteLine(=); Console.WriteLine( 学生成绩管理系统); Console.WriteLine(=); Console.WriteLine(t0.退出系统t1录入信息t2浏览信息); Console.WriteLine(t3.信息排序t4插入信息t5删除信息); Console.WriteLine(t6.查找信息t7修改信息t8清 屏); Console.WriteLine(); Console.WriteLine(请选择功效：); string str1 =Console.ReadLine(); switch (str1)/用switch语句来实现功效选择 case 0: Console.WriteLine(确定退出系统（Y/N）Alex编写); four: string str2=Console.ReadLine(); if (str2 = Y | str2 = y) b = false; else if (str2 = N | str2 = n) break; else Console.Write(请正确输入：); goto four; break; case 1: Insert(stu);break; case 2: B(stu); break; case 3: S(stu); break; case 4: I(stu); break; case 5: Del(stu); break; case 6: L(stu); break; case 7: R(stu); break; case 8: Console.Clear(); break; default: Console.WriteLine( 警告：请输入正确选项！); break; while (b); public static void Insert(Student st)/方法-录入信息 char ch = y; while (ch = y | ch = Y) one: Console.Write(请输入学号：);/用循环语句会很繁琐，使用goto语句迎刃而解 stcount.number = Int32.Parse(Console.ReadLine(); for (int i = 0; i count + 1; i+)/判定学号是否相同 goto语句应用 if (sti.number = stcount.number & (i != count) Console.WriteLine( 输入学号已存在！输入信息无效！); stcount.number = stcount - 1.number; goto one; ooo: Console.Write(请输入姓名：);/判定姓名不为空 stcount.Name = Console.ReadLine(); if (stcount.Name= ) Console.WriteLine( 警告：输入姓名为空！输入信息无效！); goto ooo; Console.Write(请输入第一门成绩：); stcount.num1 = float.Parse(Console.ReadLine(); Console.Write(请输入第二门成绩：); stcount.num2 = float.Parse(Console.ReadLine(); Console.Write(请输入第三门成绩：); stcount.num3 = float.Parse(Console.ReadLine(); count+; two:Console.WriteLine(是否继续Y/N);/goto语句跳转至此 string str2 = Console.ReadLine(); if (str2 = Y | str2 = y) ch = char.Parse(str2); else if (str2 = N | str2 = n) break; else Console.WriteLine(请输入正确选择符号！); goto two;/goto语句使用 public static void R(Student st)/方法-修改信息 if (count = 0) Console.WriteLine( 警告：请先输入学生成绩信息！); else Console.Write(请输入您需要修改学生信息学号：); int num4 = Int32.Parse(Console.ReadLine(); for (int i = 0; i count; i+) if (num4 = sti.number) Console.WriteLine(请输入您要修改信息：); Console.WriteLine(t0.退出选项t1.修改姓名t2.修改第一门课成绩); Console.WriteLine(t3.修改第二门课成绩tt4.修改第三门课成绩); int num5 = Int32.Parse(Console.ReadLine(); switch (num5) case 0: break; case 1: Console.Write(姓名：); string name2 = Console.ReadLine(); sti.Name = name2; B(st); break; case 2: Console.Write(第一门课成绩：); float num6 = float.Parse(Console.ReadLine(); sti.num1 = num6; B(st); break; case 3: Console.Write(第二门课成绩：); float num7 = float.Parse(Console.ReadLine(); sti.num2 = num7; B(st); break; case 4: Console.Write(第三门课成绩：); float num8 = float.Parse(Console.ReadLine(); sti.num3 = num8; B(st); break; public static void L(Student st)/方法-查找信息有 Console.Write(请输入您要查找学生姓名：); string sName = Console.ReadLine(); if (count != 0) Console.WriteLine(学号t姓名t第一门课t第二门课t第三门课t平均分); for (int i = 0; i count; i+) if (sti.Name = sName) float ave = (sti.num1 + sti.num2 + sti.num3) / 3; Console.WriteLine(sti.number + t + sti.Name + t + sti.num1 + t + t + sti.num2 + t + t + sti.num3 + t + t + ave); else Console.WriteLine( 警告：请先输入学生信息！); public static void B(Student st) /方法-浏览信息 if (count = 0) Console.WriteLine( 警告：无学生信息可浏览！); else Console.WriteLine(学号t姓名t第一门课t第二门课t第三门课t平均分); for (int i = 0; i count; i+) float ave = (sti.num1 + sti.num2 + sti.num3) / 3; Console.WriteLine(sti.number + t + sti.Name + t + sti.num1 + t + t + sti.num2 + t + t + sti.num3 + t + t + ave); public static void I(Student st)/方法-插入信息 Console.WriteLine(请输入需要插入学员信息：); Insert(st);/直接调用录入信息方法 public static void S(Student st)/方法-信息排序 Console.WriteLine(ta.按学号排序ttb.按成绩排序); string str = Console.ReadLine();/按学号排序 冒泡排序法 小到大 if (str = a|str=A) for (int j = 0; j count; j+) for (int i = 1; i sti.number) Student temp = sti; sti = sti - 1; sti - 1 = temp;/小-大 B(st); else if (str = b|str=B)/按平均分排序 冒泡排序法 大到小 for (int j = 0; j count; j+) for (int i = 1; i count-j; i+) float ave1 = (sti - 1.num1 + sti - 1.num2 + sti - 1.num3) / 3; float ave2 = (sti.num1 + sti.num2 + sti.num3) / 3; if (ave1 ave2) Student temp = sti; sti = sti - 1; sti - 1 = temp; B(st); else Console.WriteLine(请正确输入！); public static void Del(Student st)/方法-删除信息 Console.Write(请输入您要删除学号：); int num = Int32.Parse(Console.ReadLine();/Console.Read是读字符ASCII码值 for (int n = 0; n count; n+) if (num = stn.number) for (int i = 0; i count; i+) if (num = sti.number) for (int j = 0; j count; j+) if (num = stj.number) num = j; for (int k = num; k count - 1; k+)/把其后面值赋给要删除值，同时count-1 stk = stk + 1; count-; B(st);