C++/File/Exception Error

Use exceptions to watch for and handle I/O errors.

<source lang="cpp">

1. include <iostream>
2. include <fstream>
3. include <cstring>

using namespace std; struct inventory {

 char item[20];
 int quantity;
 double cost;

}; int main() {

 int completion_status = 0;
 ofstream fout;
 fout.exceptions(ios::failbit | ios::badbit);
 try {
   fout.open("InvDat.dat", ios::out | ios::binary);
 } catch(ios_base::failure exc) {
   cout << "Cannot open file.\n";
   cout << "String returned by what(): " << exc.what() << endl;
   return 1;
 }
 inventory inv[3];
 strcpy(inv[0].item,"A");
 inv[0].quantity = 1;
 inv[0].cost = 9.9;
 strcpy(inv[1].item, "B");
 inv[1].quantity = 2;
 inv[1].cost = 7.5;
 strcpy(inv[2].item, "C");
 inv[2].quantity = 19;
 inv[2].cost = 2.75;
 try {
   for(int i=0; i<3; i++)
     fout.write((const char *) &inv[i], sizeof(inventory));
 } catch(ios_base::failure exc) {
   cout << exc.what() << endl;
   completion_status = 1;
 }
 try {
   fout.close();
 } catch(ios_base::failure exc) {
   cout << exc.what() << endl;
   completion_status = 1;
 }
 return completion_status;

}

 </source>