C++ Read/write objects from/to file

READING AND WRITING CLASS OBJECTS
#include < iostream.h >
#include < fstream.h >
#include < iomanip.h >
class INVENTORY
{
char name[15];
int code;
float cost;
public:
void readdata();
void writedata();
};
void INVENTORY::readdata()
{
std::cout << "Enter NAme:";
std::cin >> name;
std::cout << "Enter Code:";
std::cin >> code;
std::cout << "Enter cost:";
std::cin >> cost;
}
void INVENTORY:: writedata() // formatted display on the screen
{
std::cout<setiosflag(std::iostream::left) <<="" setw(10)="" name << setiosflags(std::iostream::right)
<< setw(10) << code
<< setprecision(2)
<< setw(10) << cost;
}
void main()
{
INVENTORY item[3]; // declare Array of 3 objects
fstream file; // input and output file
file.open("STOCK.DAT",std::iostream::in | std::iostream::out);
std::cout << "Enter Details for Three items \n";
for(int i=0;i<3;i++)
{
item[i].readdata();
file.write((char *)&item[i],sizeof(item[i]));
}
file.seekg(0); //reset to start
std::cout<<"\n OUTPUT\n\n";
for(i=0;i<3;i++)
{
file.read((char *)&item[i],sizeof(item[i]));
item[i].writedata();
}
file.close();
}

output:
Enter Details for Three items
Enter NAme:C++
Enter Code:123
Enter cost:500
Enter NAme:C
Enter Code:124
Enter cost:600
Enter NAme:java
Enter Code:125
Enter cost:800


C++ 123 500
C 124 600
java 125 800