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// Fig. 4.14: fig04_14.cpp
// Passing arrays and individual array elements to functions.
#include <iostream>
using std::cout;
using std::endl;
#include <iomanip>
using std::setw;
void modifyArray( int [], int ); // appears strange
void modifyElement( int );
int main()
{
const int arraySize = 5; // size of array a
int a[ arraySize ] = { 0, 1, 2, 3, 4 }; // initialize a
cout << "Effects of passing entire array by reference:"
<< "\n\nThe values of the original array are:\n";
// output original array
for ( int i = 0; i < arraySize; i++ )
cout << setw( 3 ) << a[ i ];
cout << endl;
// pass array a to modifyArray by reference
modifyArray( a, arraySize );
cout << "The values of the modified array are:\n";
// output modified array
for ( int j = 0; j < arraySize; j++ )
cout << setw( 3 ) << a[ j ];
// output value of a[ 3 ]
cout << "\n\n\n"
<< "Effects of passing array element by value:"
<< "\n\nThe value of a[3] is " << a[ 3 ] << '\n';
// pass array element a[ 3 ] by value
modifyElement( a[ 3 ] );
// output value of a[ 3 ]
cout << "The value of a[3] is " << a[ 3 ] << endl;
return 0; // indicates successful termination
} // end main
// in function modifyArray, "b" points to
// the original array "a" in memory
void modifyArray( int b[], int sizeOfArray )
{
// multiply each array element by 2
for ( int k = 0; k < sizeOfArray; k++ )
b[ k ] *= 2;
} // end function modifyArray
// in function modifyElement, "e" is a local copy of
// array element a[ 3 ] passed from main
void modifyElement( int e )
{
// multiply parameter by 2
cout << "Value in modifyElement is "
<< ( e *= 2 ) << endl;
} // end function modifyElement
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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