You are given a collection of coins of various denominations (different monetary

Question

You are given a collection of coins of various denominations (different monetary values) and are asked to choose some or all of the coins to pay for an item of a given price without needing to be given change - ie the exact amount.

How can this be viewed as a search problem? [5 marks]

You are provided with a class Coin which has a single method getValue. If the problem starts from an array of coins, how would you represent the current state? Your answer should include a class definition showing the needed fields and method signatures. You should not provide method bodies. [10 marks]

Provide the Java code for a method getDaughters in your state representation that given a state, would generate the daughter

states. You will not be penalised for minor syntactic errors.

[10 marks]

iv. Provide the Java code for the execution of a depth first search over the states, using the class definition above. [10 marks]

Explanation / Answer

class ssort

public static int[] SORT(int[] arr)

{

for(int i =0;i<arr.length-1;i++)

{

int index=i;

for(int j=i+1;j<arr.length;j++)

if(arr[j]<arr[index])

index=j;

int sm =arr[index];

arr[index]=arr[i];

arr[i]=sm;

}

return arr;

}

public static void main(String a[])

{

int [] arr1={1,2,2,1,3,4,5,6}

int [] arr2=SORT(arr1);

for(int i:arr2)

{

System.out.print(i);

System.out.print(",");

}

}

}

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