例13.14 將一批數據以二進制形式存放在磁盤文件中。
#include <fstream>
using namespace std;
struct student
{char name[20]; 
 int num;
 int age;
 char sex;
};
int main( )
{student stud[3]={″Li″,1001,18,′f′,″Fun″,1002,19,′m′,″Wang″,1004,17,′f′}; 
 ofstream outfile(″stud.dat″,ios::binary);
   if(!outfile)
    {cerr<<″open error!″<<endl;
     abort( );//退出程序
    }
   for(int i=0;i<3;i++)
    outfile.write((char*)&stud[i],sizeof(stud[i]));
   outfile.close( );
return 0;
}