unsigned int, Cardinal, and UINT
The unsigned int, its Borland redefined Cardinal, and the Win32 UINT, data types are used to identify a 32-bit positive integer variable whose value would range from 0 to 2147484647.
C++ Builder provides an effective checking process when you use the Cardinal or the USHORT, which improves the code. For example, if the user (or the program) is supposed to provide a positive number, such as the count of students in a classroom, but provides anything else than a positive integer, the compiler would reset the value of the variable to 1; consequently, no error (called exception) would be raised. Therefore, when writing a program, it is safer to declare a positive integer as Cardinal or USHORT.
//---------------------------------------------------------------------------
#include <vcl.h>
#include <iostream.h>
#pragma hdrstop
//---------------------------------------------------------------------------
#pragma argsused
int main(int argc, char* argv[])
{
unsigned int Books;
Cardinal NbrOfToes;
USHORT NbrOfPeople;
cout << "Estimate the number of books you have: ";
cin >> Books; cout << "How many toes does a porc have? ";
cin >> NbrOfToes;
cout << "Enter the number of people who live with you: ";
cin >> NbrOfPeople;
cout << "\nYou have a collection of " << Books << " books";
cout << "\nFrom the information you supplied, a porc has "
<< NbrOfToes << " toes.";
cout << "\nYou live in a house of " << NbrOfPeople << " people.";
cout << "\n\nPress any key to continue...";
getchar();
return 0;
}
//---------------------------------------------------------------------------
