c13-15.cpp

这我们老师对是面向对象程序设计（清华大学出版社）一书制作的PPT

#include <fstream>
using namespace std;
struct student
{char name[20];
 int num;
 int age;
 char sex;
 };
int main()
{student stud[3];
 int i;
 ifstream infile("stud.dat",ios::binary);
 if(!infile)
  {cerr<<"open error!"<<endl;
   abort();
  }
  for(i=0;i<3;i++)
   infile.read((char*)&stud[i],sizeof(stud[i]));
  infile.close();
  for(i=0;i<3;i++)
   {cout<<"NO."<<i+1<<endl;
    cout<<"name:"<<stud[i].name<<endl;
    cout<<"num:"<<stud[i].num<<endl;;
    cout<<"age:"<<stud[i].age<<endl;
    cout<<"sex:"<<stud[i].sex<<endl<<endl;
   }
   return 0;
  }