C / C++ / MFC

// Step (1): create array and assign values to its elements
int a[]={0,1,10,8,7};

// Step (2): store the array on disk
ofstream ofs;
int i, count;
ofs.open("array.bin", ios::binary);
// store the element count of the array as first data in the file
count = sizeof(a)/sizeof(a[0]);
ofs.write( (char*)&count, sizeof(count));
// store array element values
for (i=0; i<count; i++)
{
  ofs.write( (char*) &a[i], sizeof(a[i]));
}
ofs.close();

// step (3): retrieve values from disk to build the array
int * pArray;
ifstream ifs;
int i, count;
ifs.open("array.bin", ios::binary);
// we know that first data in file is an integer representing array element count
ifs.read( (char*)&count, sizeof(count));
// we need to create dynamically the array
pArray = new int[count];
for (i=0; i<count; i++)
{
  ifs.read( (char*) &(pArray[i]), sizeof(pArray[i]));
}
ifs.close();
// Now we have the array
//...
// delete the arry when it is no longer needed.
delete [] pArray;

count = sizeof(a)/sizeof(a[0]);
ofs.write( (char*)&count, sizeof(count));

ofs.write( (char*)&count, sizeof(int));

li zhiyuan wrote:

any one has write() and read() specification. thanks...