modify.cpp

学生管理系统 学生管理系统 学生管理系统

#include "StuClass.h"
//修改学生档案函数
void Modify()
{	
	char sname[12];
	cout<<"输入要修改的学生学号:";
	cin>>sname;
	fstream outdel("Student.dat",ios::in|ios::out);
	outdel.seekg(0);
	Student one ;
	int i=0;
	while(!outdel.eof())
	{
		outdel.seekp(sizeof(Student)*i);
		outdel.read((char*)&one,sizeof(one));    
		if (Comparison(one.getregnum(),sname)==1 && one.Gettag()=='#')
		{     
			outdel.seekp(sizeof(Student)*i);
	        one.Getdata();
			outdel.write((char *)&one,sizeof(Student));
		}
        i++;
	}
	outdel.close();
	cout<<"按任意键继续......"<<endl;
	getch();
}