批发价列表.cpp

图书馆管理系统 查找

#include "stdafx.h"
#include"harRange.h"
#include"BookData.h"
void wholesaleTable()
{
	float total=0 ;  //批发价总和
	BookData obj;
	fstream file;
	file.open("shendan.dat",ios::in|ios::binary);
	file.clear();
	if(file.fail())
	{
		cout<<"打开文件失败!\n";
		exit(0);
	}
	cout<<"\n\n\t\t*****下面显示所有的批发价*****\n";
	file.read((char*)&obj,sizeof(obj));
	while(!file.eof())
	{
		cout<<"\t\t书名:"<<obj.getTitle ()<<"  批发价:"<<obj.getWholesale ()<<"元"<<endl;
		total+=obj.getWholesale ();
		file.read((char*)&obj,sizeof(obj));
		
	}
	cout<<"\t\t所有图书的批发价总和为:"<<total<<"元"<<endl;
	cout<<"\t\t显示完毕!\n";
	file.seekg(0L,ios::beg);
	file.close();
}