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// Fig. 4.19: fig04_19.cpp
// Linear search of an array.
#include <iostream>
using std::cout;
using std::cin;
using std::endl;
int linearSearch( const int [], int, int ); // prototype
int main()
{
const int arraySize = 100; // size of array a
int a[ arraySize ]; // create array a
int searchKey; // value to locate in a
for ( int i = 0; i < arraySize; i++ ) // create some data
a[ i ] = 2 * i;
cout << "Enter integer search key: ";
cin >> searchKey;
// attempt to locate searchKey in array a
int element = linearSearch( a, searchKey, arraySize );
// display results
if ( element != -1 )
cout << "Found value in element " << element << endl;
else
cout << "Value not found" << endl;
return 0; // indicates successful termination
} // end main
// compare key to every element of array until location is
// found or until end of array is reached; return subscript of
// element if key or -1 if key not found
int linearSearch( const int array[], int key, int sizeOfArray )
{
for ( int j = 0; j < sizeOfArray; j++ )
if ( array[ j ] == key ) // if found,
return j; // return location of key
return -1; // key not found
} // end function linearSearch
/**************************************************************************
* (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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