学生系统文件C++

二进制文件读写，链表操作

student.h

#pragma once
#include <iostream>
#include<cstring>
using namespace std;
class person
{
protected:
char name[20];
int age;
public:
person();
person(char *pname, int page);
char *get_name() { return name;}
int
get_age()
{ return age; }
char *set_name(char *pname){ strcpy(name, pname); return name; }
int set_age(int page){ age = page; return age; }
};
class student :public person
{
private:
char snum[12];
double sgpa;
public:
student *next;
student();
student(char*pname, int page, char *num, double gpa);
void input();
void show();
char
*get_snum() { return snum; }
double get_sgpa() { return sgpa; }
char
*set_snum(char *pnum)
{ strcpy(snum, pnum); return snum; }//设置
double set_sgpa(double pgpa){ sgpa = pgpa; return sgpa; }
};

mylist.h

#pragma once
#include"student.h"
class mylist
{
private:
student *head;
public:
mylist();
mylist(int n);
//构造链表（键盘输入）
mylist(student s[],int n);
//构造链表（传对象数组）
void show(int f);
//输出链表
~mylist();
void savetofile();
//保存
void readfromfile();
//读取
int delnodeforsnum(const char inputsnum[]);//根据名字删除
void delnode(student*node);
void find(const char inputsnum[]);//查找并修改
void insert();
//手动添加学生
void sort();
//按绩点排序
void swap(student*p,student*q);
//交换节点的内容（成员变量）
int change(student *node);
//修改学生信息

struct student*gethead(){ return head; }
};

stub.h

#include"mylist.h"
#include<stdlib.h>
#include<fstream>
`person::person()
{
age = 0;
}
person::person(char*pname, int page)
{
strcpy(name, pname);
age = page;
}
student::student()
{
input();
}
student::student(char*pname, int page, char* num, double gpa) :person(pname, page),
sgpa(gpa)
{
strcpy(snum, num);
//printf("||对象创建成功||n");
}
void student::show()``
{
cout << "姓名： " << name << "t"
<< "年龄： " << age << "t"
<< "学号： " << snum << "t"
<< "绩点： " << sgpa << "t"
<< endl;
}
void student::input()
{
cout << "输入姓名：";
cin >> name;
cout << "输入年龄：";
cin >> age;
cout << "输入学号：";
cin >> snum;
cout << "输入绩点：";
cin >> sgpa;
}

mylist.h

#include "mylist.h"
#include <iostream>
#include <fstream>
mylist::mylist()
{
head = new student("无", 1, "00000000000", 0.0);
head->next = NULL;
}
mylist::mylist(int n)
{
head = new student("无",1,"00000000000",0.0);
head->next = NULL;
int i;
for (i = 0; i < n; i++)
{
student *p = new student();
p->next = head->next;
head->next = p;
}
}
mylist::mylist(student s[], int n)
{
/*head = new student("无", 1, "00000000000", 0.0);
head->next = NULL;*/
int i;
for (i = 0; i < n; i++)
{
student *p = new student(s[i].get_name(),s[i].get_age(),s[i].get_snum(),s[i].get_sgpa());
p->next = head->next;
head->next = p;
}
}
//打印 0/1:横/竖打印
void mylist::show(int f)
{
student *p = head->next;
if (f == 0)
{
while (p)
{
cout << "姓名： " << p->get_name() << "t"
<< "年龄： " << p->get_age()
<< "t"
<< "学号： " << p->get_snum() << "t"
<< "绩点： " << p->get_sgpa() << "t"
<< endl;
p = p->next;
}
}
if (f == 1)
{
cout << "姓名" << "t" << "年龄" << "t" << "学号" << "tt" << "绩点" << endl;
while (p)
{
cout << p->get_name() << "t"
<< p->get_age()
<< "t"
<< p->get_snum() << "t"
<< p->get_sgpa() << "t"
<< endl;
p = p->next;
}
}
}
void mylist::savetofile()
{
ofstream outFile("student.dat", ios::out | ios::binary);//写入
student*p = head->next;
while (p)
{
outFile.write((char*)p, sizeof(*p));
//写入
p = p->next;
}
outFile.close();
}
void mylist::readfromfile()
{
ifstream inFile("student.dat", ios::in | ios::binary); //二进制读方式打开
head = new student("无", 1, "00000000000", 0.0);
head->next = NULL;
student p("",0,"",0.0);
while (inFile.read((char *)&p, sizeof(student)))//一直读到文件结束 
{
//printf("%d ",inFile.gcount());
//打印
//inFile.gcount()返回值就是最近一次 read() 方法成功读取的字节数
student *newnode = new student(p.get_name(), p.get_age(), p.get_snum(), p.get_sgpa());
newnode->next = head->next;
head->next = newnode;
}
inFile.close();
}
void mylist::insert()//插入信息
{
student *p = new student();//手动输入
p->next = head->next;
head->next = p;
}
void mylist::find(const char inputsnum[])//返回找到指定名字的学生人数
{
student *p = head->next;
int sum = 0;//人数
while (p)
{
if (strcmp(p->get_snum(), inputsnum) == 0)
{
sum++;
printf("找到学生：%sn",p->get_snum());
change(p);
}
p = p->next;
}
if (sum == 0)
printf("没有找到此学生：%sn",inputsnum);
}
void mylist::delnode(student*node) //删除一个节点
{
student*p = head, *q = head->next;
while (q!=node)
{
p = p->next;
q = q->next;
}
p->next = q->next;
delete q;
}
int mylist::delnodeforsnum(const char inputsnum[])
//依据姓名删除
{
student *p = head->next;
printf("正在删除：%sn",inputsnum);
while (p)
{
if (strcmp(p->get_name(), inputsnum) == 0)
{
delnode(p);
//删除节点
printf("删除成功!n");
return 0;
}
p = p->next;
}
printf("未找到学生！n");
return -1;
}
void mylist::sort()
//冒泡排序
{
student*p = head->next,*q=p->next;
student*last = NULL;
int temp1;
while (p != last)
{
while (q != last)
{
if (p->get_sgpa() > q->get_sgpa())
{
swap(p,q);// 交换两个节点内容（成员变量）
}
p = p->next;
q = q->next;
}
last = p;
//重置p,q
p = head->next;
q = p->next;
}
}
void mylist::swap(student*p, student*q)//交换两个节点内容
{
int temp1;
char temp2[40];
double temp3;
strcpy(temp2,p->get_name());
p->set_name(q->get_name());
q->set_name(temp2);
temp1 = p->get_age();
p->set_age(q->get_age());
q->set_age(temp1);
strcpy(temp2, p->get_snum());
p->set_snum(q->get_snum());
q->set_snum(temp2);
temp3 = p->get_sgpa();
p->set_sgpa(q->get_sgpa());
q->set_sgpa(temp3);
}
int mylist::change(student *node) //修改
{
student*p = node;
char pname[20], psnum[12];
int page;
double pgpa;
printf("修改信息：n");
p->show();
int n;
printf("修改选择：（0：全部修改）（1：单项修改）（其它按键：不做修改）n");
cout << "请输入修改方式( 0 或 1 )："; cin >> n;
if (n == 0)
{
//输入信息
cout << "输入新名字："; cin >> pname;
cout << endl;
cout << "输入新年龄："; cin >> page;
cout << endl;
cout << "输入新学号："; cin >> psnum;
cout << endl;
cout << "输入新绩点："; cin >> pgpa;
cout << endl;
//更改信息
p->set_name(pname);
p->set_age(page);
p->set_snum(psnum);
p->set_sgpa(pgpa);
}
else if (n == 1)
{
int m = 0;
cout << "输入0:修改姓名" << endl;
cout << "输入1:修改年龄" << endl;
cout << "输入2:修改学号" << endl;
cout << "输入3:修改绩点" << endl;
cin >> m;
switch (m)
{
case 0:
cout << "输入新名字："; cin >> pname;
p->set_name(pname);
break;
case 1:
cout << "输入新年龄："; cin >> page;
p->set_age(page);
break;
case 2:
cout << "输入新学号："; cin >> psnum;
p->set_snum(psnum);
break;
case 3:
cout << "输入新绩点："; cin >> pgpa;
p->set_sgpa(pgpa);
break;
default:
cout << "输入不规范" << endl;
return 0;
}
}
else
{
cout << "没有修改" << endl;
return 0;
}
return 1;
}
mylist::~mylist()
{
}

最后

以上就是高大金针菇为你收集整理的学生系统文件C++的全部内容，希望文章能够帮你解决学生系统文件C++所遇到的程序开发问题。

如果觉得靠谱客网站的内容还不错，欢迎将靠谱客网站推荐给程序员好友。