Sams Teach Yourself C++ in 21 Days

19: long DaysAlive;

20: };

21:

22: int main() // returns 1 on error

23: {

24: char fileName[80];

25:

26:

27: cout << “Please enter the file name: “;

28: cin >> fileName;

29: ofstream fout(fileName,ios::binary);

30: if (!fout)

31: {

32: cout << “Unable to open “ << fileName << “ for writing.\n”;

33: return(1);

34: }

35:

36: Animal Bear(50,100);

37: fout.write((char*) &Bear,sizeof Bear);

38:

39: fout.close();

40:

41: ifstream fin(fileName,ios::binary);

42: if (!fin)

43: {

44: cout << “Unable to open “ << fileName << “ for reading.\n”;

45: return(1);

46: }

47:

48: Animal BearTwo(1,1);

49:

50: cout << “BearTwo weight: “ << BearTwo.GetWeight() << endl;

51: cout << “BearTwo days: “ << BearTwo.GetDaysAlive() << endl;

52:

53: fin.read((char*) &BearTwo, sizeof BearTwo);

54:

55: cout << “BearTwo weight: “ << BearTwo.GetWeight() << endl;

56: cout << “BearTwo days: “ << BearTwo.GetDaysAlive() << endl;

57: fin.close();

58: return 0;

59: }

Please enter the file name: Animals

BearTwo weight: 1

BearTwo days: 1

BearTwo weight: 50

BearTwo days: 100

OUTPUT

630 Day 17

LISTING17.18 continued