list0909.cpp

teach yourself C++ in 21 days 第五版

//Listing 9.9
// Returning multiple values from a function
// using references
#include <iostream>
 
using namespace std;
  
enum ERR_CODE { SUCCESS, ERROR };
  
ERR_CODE Factor(int, int&, int&);
  
int main()
{
    int number, squared, cubed;
    ERR_CODE result;
  
    cout << "Enter a number (0 - 20): ";
    cin >> number;
  
    result = Factor(number, squared, cubed);
  
    if (result == SUCCESS)
    {
       cout << "number: " << number << endl;
       cout << "square: " << squared << endl;
       cout << "cubed: "  << cubed   << endl;
    }
    else
       cout << "Error encountered!!" << endl;
    return 0;
}
  
ERR_CODE Factor(int n, int &rSquared, int &rCubed)
{
    if (n > 20)
       return ERROR;   // simple error code
    else
    {
       rSquared = n*n;
       rCubed = n*n*n;
       return SUCCESS;
    }
}