学籍管理系统C++源代码 |21xrx.com

学籍管理系统C++源代码

2023-07-05 12:33:51 深夜i 8 0

学籍管理系统 C++源代码学生信息管理教师信息管理数据库设计

学籍管理系统是一款可以方便管理学生信息的软件，包括学生的基本信息、学业信息、考试成绩等，能够实现对学生信息的查看、修改、添加、删除等操作。下面是学籍管理系统的C++源代码：

#include<iostream>
#include<fstream>
#include<cstring>
#include<iomanip>
#include<conio.h>
using namespace std;
class student
{
  int roll_no;
  char name[50];
  int maths,eng,science,total;
  float per;
  char grade;
  void calculate()
  {
    total=maths+eng+science;
    per=total/3.0;
    if(per>=60)
      grade='A';
    else if(per>=50&&per<60)
      grade='B';
    else if(per>=33&&per<50)
      grade='C';
    else
      grade='F';
  }
public:
  void getdata()
  {
    cout<<"\nEnter the Roll number of student: ";
    cin>>roll_no;
    cout<<"\nEnter the Name of student : ";
    cin.ignore();
    cin.getline(name,50);
    cout<<"\nEnter the marks in Maths out of 100 : ";
    cin>>maths;
    cout<<"\nEnter the marks in English out of 100 : ";
    cin>>eng;
    cout<<"\nEnter the marks in Science out of 100 : ";
    cin>>science;
    calculate();
  }
  void showdata()
  {
    cout<<"\nRoll number of student : "<<roll_no;
    cout<<"\nName of student : "<<name;
    cout<<"\nMarks in Maths : "<<maths;
    cout<<"\nMarks in English : "<<eng;
    cout<<"\nMarks in Science : "<<science;
    cout<<"\nTotal Marks : "<<total;
    cout<<"\nPercentage : "<<setprecision(2)<<per;
    cout<<"\nGrade : "<<grade;
  }
  int retrollno()
  
    return roll_no;
  
};
fstream fp;
student st;
void write_student()
{
  fp.open("student.dat",ios::binary|ios::app);
  st.getdata();
  fp.write((char*)&st,sizeof(student));
  fp.close();
  cout<<"\n\nStudent record Has Been Created ";
  getch();
}
void display_all()
{
  cout<<"\n\n\n\t\tDISPLAY ALL RECORD !!!\n\n";
  fp.open("student.dat",ios::binary);
  while(fp.read((char*)&st,sizeof(student)))
  {
    st.showdata();
    cout<<"\n\n====================================\n";
  }
  fp.close();
  getch();
}
void display_sp(int n)
{
  int flag=0;
  fp.open("student.dat",ios::binary);
  while(fp.read((char*)&st,sizeof(student)))
  {
    if(st.retrollno()==n)
    {
      st.showdata();
      flag=1;
    }
  }
  fp.close();
  if(flag==0)
    cout<<"\n\nrecord not exist";
  getch();
}
void modify_student()
{
  int no,found=0;
  cout<<"\n\n\tTo Modify ";
  cout<<"\n\n\tPlease Enter The roll number of student";
  cin>>no;
  fp.open("student.dat",ios::binary|ios::in|ios::out);
  while(fp.read((char*)&st,sizeof(student))&&found==0)
  {
    if(st.retrollno()==no)
    {
      st.showdata();
      cout<<"\n\nPlease Enter The New Details of student"<<endl;
      st.getdata();
      int pos=(-1)*sizeof(st);
      fp.seekp(pos,ios::cur);
      fp.write((char*)&st,sizeof(student));
      cout<<"\n\n\t Record Updated";
      found=1;
    }
  }
  fp.close();
  if(found==0)
    cout<<"\n\n Record Not Found ";
  getch();
}
void delete_student()
{
  int no;
  cout<<"\n\n\n\tDelete Record";
  cout<<"\n\nPlease Enter The roll number of student You Want To Delete: ";
  cin>>no;
  fp.open("student.dat",ios::binary);
  fstream fp2;
  fp2.open("Temp.dat",ios::out|ios::binary);
  fp.seekg(0,ios::beg);
  while(fp.read((char*)&st,sizeof(student)))
  {
    if(st.retrollno()!=no)
      fp2.write((char*)&st,sizeof(student));
  }
  fp2.close();
  fp.close();
  remove("student.dat");
  rename("Temp.dat","student.dat");
  cout<<"\n\n\tRecord Deleted ..";
  getch();
}
void menu()
{
  int option;
  do
  {
    cout<<"\n\n\n\t\t\t\tSTUDENT REPORT CARD SYSTEM\n\n";
    cout<<"\t\t\t\t1. CREATE STUDENT RECORD";
    cout<<"\n\t\t\t\t2. DISPLAY ALL STUDENTS RECORDS";
    cout<<"\n\t\t\t\t3. SEARCH STUDENT RECORD ";
    cout<<"\n\t\t\t\t4. MODIFY STUDENT RECORD";
    cout<<"\n\t\t\t\t5. DELETE STUDENT RECORD";
    cout<<"\n\t\t\t\t6. EXIT";
    cout<<"\n\n\t\t\t\tEnter Your Option (1-6): ";
    cin>>option;
    switch(option)
    {
      case 1: write_student(); break;
      case 2: display_all(); break;
      case 3:
        int num;
        cout<<"\n\n\tPlease Enter The roll number: ";
        cin>>num;
        display_sp(num);
        break;
      case 4: modify_student(); break;
      case 5: delete_student(); break;
      case 6: exit(0); break;
      default: cout<<"\a";
    }
  }while(option!=6);
}
int main()
{
  menu();
  return 0;
}

以上是学籍管理系统的源代码，通过这段代码可以看到，该系统主要由一些类和函数组成，其中 `student` 类被用来表示学生的信息，包括姓名、学号、各科成绩、总分、百分比和等级。其他函数包括：添加学生数据、显示所有学生数据、查询学生数据、修改学生数据以及删除学生记录。通过这些函数，用户可以方便地管理学生信息。

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