50_array_search.cpp

/*Goal: practice searching an array in C++
 **There is an array of integers. The length of the arrays to be searched 
 **varies. A user will enter a postive integer and the program will search the array.
 **If the value is in the array, the program will return the location of 
 **the element. If the value is not in the array, the user will be notified 
 **that the value is not in the array. To exit the program the user will enter -1.
 */

#include <iostream>
#include <stdio.h>

int
main ()
{
  int searchKey = 0;
  int searchArray[10] =
    { 324, 4567, 6789, 5421345, 7, 65, 8965, 12, 342, 485 };
  int location = 0;

  while (1)
    {
      std::cout << "Enter an integer ('-1' to quit): ";
      scanf ("%d", &searchKey);
      std::cout << searchKey << "\n";
      if (searchKey == -1)
	{
	  break;
	}
      for (int i = 0; i < 10; i++)
	{
	  if (searchKey == searchArray[i])
	    {
	      location = i;
	      break;
	    }
	  location = -1;
	}
      if (location != -1)
	{
	  std::
	    cout << searchKey << " is at location " << location <<
	    " in the array.\n";
	}
      else
	{
	  std::cout << searchKey << " is not in the array.\n";
	}
    }
  return 0;
}


/*
Enter an integer ('-1' to quit): 56                                                                                                              
56                                                                                                                                               
56 is not in the array.                                                                                                                          
Enter an integer ('-1' to quit): 65                                                                                                              
65                                                                                                                                               
65 is at location 5 in the array.   
*/