student_structure.h

课程设计

#include <string.h>

#include <fstream.h>
#pragma once
struct student_structure
{
	char name[10];
	char number[10];
	char sex[2];
	char birthday[8];
	char zzmm[4];
	char jtzz[20];
};
const int MAXSIZE=100;

class sheet
{
	student_structure sheet_information[MAXSIZE];
	int length;
public:
	sheet()
	{
		fstream file;
		
		file.open("information.dat",ios::in);
		if(!file)
			return;
		file.read((char*)&sheet_information[0],sizeof(student_structure));
		length=0;
		while(!file.eof())
		{
			length++;
			file.read((char*)&sheet_information[length],sizeof(student_structure));
		}

		file.close();
	}
	~sheet()
	{
		fstream file;
		
		file.open("information.dat",ios::out);
		
		for(int i=0;i<length;i++)
		{
			file.write((char*)&sheet_information[i],sizeof(student_structure));
		}
		
		file.close();
	}

	void insert(student_structure information)
	{
		strcpy(sheet_information[length].name,information.name);
		strcpy(sheet_information[length].number,information.number);
		strcpy(sheet_information[length].sex,information.sex);
		strcpy(sheet_information[length].zzmm,information.zzmm);
		strcpy(sheet_information[length].jtzz,information.jtzz);
		length++;
		return;

	
	}
	void delete_by_name(char* number)
	{
		int i;
		i=query(number);
		if (i!=-1)
		{
			for(int j=i+1;j<length;j++)
				sheet_information[j-1]=sheet_information[j];
		}
		return;
	}

	int query(char* number)
	{
	
		for (int i=0;i<length;i++)
		{
			if(!strcmp(number,sheet_information[i].number))
				return i;
		}
		return -1;
	}
	void display()
	{
		for(int i=0;i<length;i++)
		{
			cout <<sheet_information[i].name<<"  "<<sheet_information[i].number<<"  "<<sheet_information[i].sex<<"  "<<sheet_information[i].birthday<<"  "<<sheet_information[i].zzmm<<"  "<<sheet_information[i].jtzz<<endl;
		}
		return;
	}
	void modify(char *number)
	{
		int i;
		i=query(number);
		if (i==-1 ) 
			throw "查找失败！！！";
		cout<<"input the new information"<<endl;

		cout<<"birthday:";
		cin >>sheet_information[i].birthday;
		cout<<"政治面貌:";
		cin>>sheet_information[i].zzmm;
		cout<<"家庭住址:";
		cin>>sheet_information[i].jtzz;
		return;
	}
};