流类库6

#include<iostream>
#include<fstream>
#include<cstring>
using namespace std;
struct SalaryInfo{
unsigned id;
double salary;
};
int main()
{
SalaryInfo employee1={600001,8000};
ofstream os("payroll",ios_base::out | ios_base::binary);
os.write(reinterpret_cast<char *>(&employee1),sizeof(employee1));
os.close();
ifstream is("payroll",ios_base::in | ios_base::binary);
if(is){
SalaryInfo employee2;
is.read(reinterpret_cast<char *>(&employee2),sizeof(employee2));
cout<<employee2.id<<" "<<employee2.salary<<endl;
}else{
cout<<"ERROR:Cannot open file 'payroll'."<<endl;
}
is.close();
return 0;
}