试着用C语言简单的做了一个学生成绩管理系统，但是一直有错误，改来改去还是不行，求解答~

Question

我还不是很会自己写代码，自己写了一点，又借鉴了一些别人的代码，有一些地方不是很理解，所以代码运行不出来也是正常的，但是我就是想弄明白到底是什么问题，要怎么修改，请大家指点一下我~

#include<stdio.h>
#define N 5000

struct student
{
char Stu_Name[32];
long int Stu_ID;
int English_Score;
int Math_score;
int C_Score;
int Total;
}STU[N];
int n;
extern void menu();
extern int InporData(struct student stu[]);
extern void saveData(char *FileName,struct student stu[],int n);
extern int ReadData(char *FileName,struct student stu[]);
extern void Browe(struct student stu[],int n);
extern int Select(struct student STU[],int ID,struct student *Result,int n);
extern int Insert(struct student STU[],int *n);
extern int Delete(struct student STU[],int ID,int *n);
extern int Modify(struct student STU[],int ID,int n);
extern void sortTotal(struct student stu[],int n);




{
    public struct Student
    {
        public string Name;//定义名字
        public string Xuehao;//定义学号
        public string Class;//班级
        public int English_Score;//英语成绩
        public Math_score;//数学成绩
        public C_Score;//c语言成绩
        public double Total;//总成绩
    }
    class Program
    {
        static Student[] stu = new Student[5000];
        static int count;
        //初始化数组
        public static void moren()//默认的五位同学信息
        {
            stu[0].Xuehao = "0001";
            stu[0].Name = "明明";
            stu[0].Class = "1903";
            stu[0].English_Score = 78;
            stu[0].Math_score = 88;
            stu[0].C_score = 84;
            stu[0].Total= 250;

            stu[1].Xuehao = "0002";
            stu[1].Name = "欧欧";
            stu[1].Class = "1903";
            stu[1].English_Score = 86;
            stu[1].Math_score= 82;
            stu[1].C_score = 88;
            stu[1].Total= 256;

            stu[2].Xuehao = "0003";
            stu[2].Name = "莎莎";
            stu[2].Class = "1903";
            stu[2].English_Score = 88;
            stu[2].Math_score = 92;
            stu[0].C_score = 89;
            stu[2].Total= 269;

            stu[3].Xuehao = "0004";
            stu[3].Name = "琳琳";
            stu[3].Class = "1903";
            stu[3].English_Score = 90;
            stu[3].Math_score= 87;
            stu[0].C_score = 78;
            stu[3].Total = 255;

            stu[4].Xuehao = "0005";
            stu[4].Name = "月月";
            stu[4].Class = "1903";
            stu[4].English_Score = 83;
            stu[4].Math_score= 88;
            stu[0].C_score = 90;
            stu[4].Total = 261;
            count = 5;
        }

        public static void Man()//主菜单
        {
            Console.WriteLine("1.查询学生信息");
            Console.WriteLine("2.录入学生信息");
            Console.WriteLine("3.修改学生信息");
            Console.WriteLine("4.删除学生信息");
            Console.WriteLine("5.退出");
        }
        public static void AddStudent()
        {
            string flag;
            do
            {
                Console.WriteLine("请输入学号：");
                stu[count].Xuehao = Console.ReadLine();
                Console.WriteLine("请输入姓名：");
                stu[count].Name = Console.ReadLine();
                Console.WriteLine("请输入班级：");
                stu[count].Class = Console.ReadLine();
                Console.WriteLine("请输入英语成绩：");
                stu[count].English_Score = int.Parse(Console.ReadLine());
                Console.WriteLine("请输入数学成绩：");
                stu[count].Math_score= Console.ReadLine();
                 Console.WriteLine("请输入c语言成绩：");
                stu[count].C_Score= Console.ReadLine();
                Console.WriteLine("请输入总成绩：");
                stu[count].Total = double.Parse(Console.ReadLine());
                count++;
                Console.WriteLine("添加成功！是否继续添加(y/n)?");
                flag = Console.ReadLine();
            } while (flag == "Y" || flag == "y");
        } //录入信息功能
       public static void FindStudent()
        {
            string choose;
            do
            {
                Console.WriteLine("1.查询全部");
                Console.WriteLine("2.按班级查询");
                Console.WriteLine("3.按学号查询");
                Console.WriteLine("4.按姓名查询");
                Console.WriteLine("5.按总分数查询排名");
                Console.WriteLine("0.返回上一级菜单");
                Console.WriteLine("请选择：");
                choose = Console.ReadLine();
                switch (choose)
                {
                    case "1":
                        FindAll();//查询全部
                        break;
                    case "2":
                        FindClass();//查询班级
                        break;
                    case "3":
                        FindXueHao();//查询学号
                        break;
                    case "4":
                        FindName();//按名字查询
                        break;
                    case "5":
                        FindSTotal();//按总成绩查询
                        break;
                    case "0":
                        Console.WriteLine("欢迎再次查询");
                        break;
                }
            } while (choose != "0");//等于0则循环，不等于则结束
        } //查询界面
        //全部查询界面
        public static void FindAll()
        {
            Console.WriteLine("学号\t姓名\t班级\t英语成绩\t数学成绩\tc语言成绩\t总成绩\t");
            for (int i = 0; i < count; i++)
            {
                Console.Write(stu[i].Xuehao + "\t");
                Console.Write(stu[i].Name + "\t");
                Console.Write(stu[i].Class + "\t");
                Console.Write(stu[i].English_Score + "\t");
                Console.Write(stu[i].Math_score + "\t");
                Console.Write(stu[i].C_Score + "\t");
                Console.Write(stu[i].Total + "\t");
                Console.WriteLine("");
            }
        }//查询全部
        //按班级查询
        public static void FindClass()
        {
            string BanJi, chooes;
            do
            {
                Console.WriteLine("请输入班级：");
                BanJi = Console.ReadLine();
                Console.WriteLine("学号\t姓名\t班级\t英语成绩\t数学成绩\tc语言成绩\t总成绩\t");
                for (int i = 0; i < count; i++)
                {
                    if (BanJi == stu[i].Class)
                    {
                        Console.Write(stu[i].Xuehao + "\t");
                        Console.Write(stu[i].Name + "\t");
                        Console.Write(stu[i].Class + "\t");
                        Console.Write(stu[i].English_Score + "\t");
                        Console.Write(stu[i].Math_score + "\t");
                        Console.Write(stu[i].C_Score + "\t");
                        Console.Write(stu[i].Total + "\t");
                        Console.WriteLine("");
                    }
                    else
                    {
                        continue;
                    }
                }
                Console.WriteLine("是否继续按班级查询？(y/n)");
                chooes = Console.ReadLine();
            } while (chooes == "Y" || chooes == "y");

        }//查询班级
        //按学号查询
        public static void FindXueHao()
        {
            string Xuehao, chooes;
            do
            {
                Console.WriteLine("请输入学号：");
                Xuehao = Console.ReadLine();
                Console.WriteLine("学号\t姓名\t班级\t英语成绩\t数学成绩\tc语言成绩\t总成绩\t");
                for (int i = 0; i < count; i++)
                {
                    if (Xuehao == stu[i].Xuehao)
                    {
                       Console.Write(stu[i].Xuehao + "\t");
                        Console.Write(stu[i].Name + "\t");
                        Console.Write(stu[i].Class + "\t");
                        Console.Write(stu[i].English_Score + "\t");
                        Console.Write(stu[i].Math_score + "\t");
                        Console.Write(stu[i].C_Score + "\t");
                        Console.Write(stu[i].Total + "\t");
                        Console.WriteLine("");
                    }
                    else
                    {
                        continue;
                    }
                }
                Console.WriteLine("是否继续按学号查询？(y/n)");
                chooes = Console.ReadLine();
            } while (chooes == "Y" || chooes == "y");

        }//查询学号
        //按姓名查询
        public static void FindName()
        {
            string Name, chooes;
            do
            {
                Console.WriteLine("请输入姓名：");
                Name = Console.ReadLine();
                Console.WriteLine("学号\t姓名\t班级\t英语成绩\t数学成绩\tc语言成绩\t总成绩\t");
                for (int i = 0; i < count; i++)
                {
                    if (Name == stu[i].Name)
                    {
                        Console.Write(stu[i].Xuehao + "\t");
                        Console.Write(stu[i].Name + "\t");
                        Console.Write(stu[i].Class + "\t");
                        Console.Write(stu[i].English_Score + "\t");
                        Console.Write(stu[i].Math_score + "\t");
                        Console.Write(stu[i].C_Score + "\t");
                        Console.Write(stu[i].Total + "\t");
                        Console.WriteLine("");
                    }
                    else
                    {
                        continue;
                    }
                }
                Console.WriteLine("是否继续按姓名查询？(y/n)");
                chooes = Console.ReadLine();
            } while (chooes == "Y" || chooes == "y");

        }//名字查询
        //按分数查询排名
        static void Bubble()//冒号排序法
        {
            Student temp = new Student();
            for (int i = count; i > 0; i--)
            {
                for (int j = 0; j < i - 1; j++)
                {
                    if (stu[j].Total < stu[j + 1].Total)
                    {
                        temp = stu[j];
                        stu[j] = stu[j + 1];
                        stu[j + 1] = temp;
                    }
                }
            }
        }
        public static void FindTotal()
        {
            Bubble();
            Console.WriteLine("学号\t姓名\t班级\t英语成绩\t数学成绩\tc语言成绩\t总成绩\t");
            for (int i = 0; i < count; i++)
            {
                Console.Write(stu[i].Xuehao + "\t");
                Console.Write(stu[i].Name + "\t");
                Console.Write(stu[i].Class + "\t");
                Console.Write(stu[i].English_Score + "\t");
                Console.Write(stu[i].Math_score + "\t");
                Console.Write(stu[i].C_Score + "\t");
                Console.Write(stu[i].Total + "\t");
                Console.WriteLine("");
            }
        }//成绩排名查询

        public static void ShanChuXueHao() //输入学号删除信息
        {

            Console.WriteLine("请输入学号：");
            string stuno = Console.ReadLine();
            int index = XHo(stuno);
            if (index == -1)
            {
                Console.WriteLine("输入错误,请重新输入！");
            }
            else if (index == count - 1)
            {
                count--;
                Console.WriteLine("删除成功！");
            }
            else
            {
                for (int i = index; i < count; i++)
                {
                    stu[i] = stu[i + 1];
                }
                count--;
                Console.WriteLine("删除成功！");
            }
        }


        //要修改的学生信息
        public static void XinXi(string coun)
        {
            Console.WriteLine("要修改的学生信息：");
            for (int i = 0; i < count; i++)
            {
                if (coun == stu[i].Xuehao)
                {
                    Console.WriteLine("姓名：" + stu[i].Name);
                    Console.WriteLine("班级：" + stu[i].Class);
                    Console.WriteLine("英语成绩：" + stu[i].English_Score);
                    Console.WriteLine("数学成绩：" + stu[i].Math_score);
                    Console.WriteLine("c语言成绩：" + stu[i].C_Score);
                    Console.WriteLine("总成绩：" + stu[i].Total);

                }
                else
                {
                    continue;
                }
            }
        }
        //修改学生信息
        public static void XGXX()
        {
            Console.WriteLine("请输入学号！");
            string coun = Console.ReadLine();
            XinXi(coun);
            Console.WriteLine("请选择要修改的内容：");
            Console.WriteLine("1.姓名");
            Console.WriteLine("2.班级");
            Console.WriteLine("3.英语成绩");
            Console.WriteLine("4.数学成绩");
            Console.WriteLine("5.c语言成绩");
            Console.WriteLine("6.总成绩");
            Console.WriteLine("请选择：");
            string a = Console.ReadLine();
            for (int i = 0; i < count; i++)
            {
                if (coun == stu[i].Xuehao)
                {
                    if (a == "1")
                    {
                        Console.WriteLine("请输入新的姓名");
                        stu[i].Name = Console.ReadLine();
                    }
                    else if (a == "2")
                    {
                        Console.WriteLine("请输入新的班级");
                        stu[i].Class = Console.ReadLine();
                    }
                    else if (a == "3")
                    {
                        Console.WriteLine("请输入新的英语成绩");
                        stu[i].English_Score = Console.ReadLine();
                    }
                    else if (a == "4")
                    {
                        Console.WriteLine("请输入新的数学");
                        stu[i].Math_score = int.Parse(Console.ReadLine());
                    }
                    else if (a == "5")
                    {
                        Console.WriteLine("请输入新的c语言成绩");
                        stu[i].C_Score = float.Parse(Console.ReadLine());
                    }
                    else if (a == "6")
                    {
                        Console.WriteLine("请输入新的总成绩");
                        stu[i].Total = float.Parse(Console.ReadLine());
                    }
                    Console.WriteLine("修改成功");
                }
                else
                {
                    continue;
                }
            }

        }
        static void Main(string[] args)
        {
            moren();
            int chooes;
            do
            {
                Man();
                Console.WriteLine("请选择序号!");
                chooes = int.Parse(Console.ReadLine());
                switch (chooes)
                {
                    case 1:
                        FindStudent();
                        break;
                    case 2:
                        AddStudent();
                        break;
                    case 3:
                        XGXX();
                        break;
                    case 4:
                        ShanChuXueHao();
                        break;
                    case 5:
                        Console.WriteLine("已退出");
                        break;
                    default:
                        Console.WriteLine("输入错误！，请重新输入！");
                        break;

                }
            } while (chooes != 5);
        }
    }
}

Answer 1

大哥，你这是c吗？ 我怎么赶紧语法更像java或者其他了。。。。

c语言的基本语法了解一下，然后我根据你的意图，简单使用了一下相关基本语法，你看看： 类怎么定义，类成员函数怎么定义，c里面的main函数等

//链表
#include<stdio.h>
#include<stdlib.h>
#include <iostream>
#include <string>
using namespace std;

struct Student
{
    string Name;//定义名字
    string Xuehao;//定义学号
    string Class;//班级
    int English_Score;//英语成绩
    int Math_score;//数学成绩
    float C_Score;//c语言成绩
    double Total;//总成绩
};

struct Student st[4];
class Program
{
public:
    Program() {}
    ~Program(){}
public:
    void man() { printf("this is man \n"); }
    void test() {
        for (int i = 0; i < 4; i++)
        {
            st[i].Name = "myname"+ std::to_string(i);
            st[i].Math_score = 5+ i;
        }
    }
    void testprint()
    {
        for (int i = 0; i < 4; i++)
        {
            printf("%d  %s %d \n", i, st[i].Name.c_str(), st[i].Math_score);
        }
    }

};
int main()
{
    class Program mytest;
    mytest.man();
    mytest.test();
    mytest.testprint();
    return 0;
}