C++/File/Exception Error
Use exceptions to watch for and handle I/O errors.
<source lang="cpp">
- include <iostream>
- include <fstream>
- 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>