Материал из C\C++ эксперт
Use exceptions to watch for and handle I/O errors.
#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;
}
