Reputation:
I am getting an error when making the call to method findPosition. What I'm trying to do with the program is measure how long the algorithm runs on average, over 1000 iterations of it. Then I want to call the method and find the position of the value (if it is found) in the array. I'm getting a compiler error that the arguments being passed do not match the method. Specifically, the second argument is being taken as an int, even though I want to pass the value in an array. I can't find my error and am new to working with arrays, so thank you in advance if you can tell me where my mistake is.
import java.util.*;
public class AlgorithmRuntime
{
static int num = 0;
static long total = 0;
static long average = 0;
public static void main (String[] args)
{
boolean isValueInArray;
int searchValue;
do {
// 1. Setup
int size = 1000;
long sum = 0;
int[] iArray = new int[size];
Random rand = new Random(System.currentTimeMillis());
for (int i = 0; i < size; i++)
iArray[i] = rand.nextInt();
searchValue = rand.nextInt(1000) + 1;
// 2. Start time
long start = System.nanoTime();
// 3. Execute algorithm
for (int j = 0; j < size; j++)
{
if (iArray[j] == searchValue)
{
isValueInArray = true;
}
if (isValueInArray == true)
findPosition(searchValue, iArray[isValueInArray]);
}
// 4. Stop time
long stop = System.nanoTime();
long timeElapsed = stop - start;
total = total + timeElapsed;
num++;
} while (num < 1000);
average = total / 1000;
System.out.println("The algorithm took " + average
+ " nanoseconds on average to complete.");
}
}
public int findPosition(int valueOfInt, int[] array)
{
for (int i = 0; i < array.length; i++)
if (array[i] == valueOfInt)
return i;
return -1;
}
Upvotes: 0
Views: 50
Reputation: 68715
findPostion
method accepts two arguments; one of type int
and another of type int array
. Here is the signature of findPosition:
public int findPosition(int valueOfInt, int[] array)
but you are passing it two int values as mentioned here:
findPosition(searchValue, iArray[isValueInArray];
isArray
is an int array but iArray[isValueInArray]
is an int value at index isValueInArray
.
You need to pass an array as the second param instead of an int value.
Upvotes: 1
Reputation: 460
You need to pass in
if (isValueInArray == true) {
findPosition(searchValue, iArray);
}
iArray[isValueInArray] will give you an int value and not the array.
Upvotes: 1