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POJava - Stacks - checking if 2 numbers of the stack equal 100
 

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  1. POJava - Stacks - checking if 2 numbers of the stack equal 100
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    <p>I have to check the sum of which 2 values in the stack equal 100 and print out the indecis and the numbers. I have made this possible using arrays but i can't get it to work using stacks. Please help me. I have wrote the following until now and it doesn't give me the right output.</p> <pre><code>import java.util.Stack; public class 2 { public static void main(String[] args) { int x = 100; Stack stack=new Stack(); Stack tempStack=new Stack(); stack.push(new Integer(20)); stack.push(new Integer(53)); stack.push(new Integer(41)); stack.push(new Integer(38)); stack.push(new Integer(28)); stack.push(new Integer(47)); stack.push(new Integer(70)); stack.push(new Integer(30)); stack.push(new Integer(80)); stack.push(new Integer(400)); stack.push(new Integer(3)); stack.push(new Integer(20)); tempStack = (Stack) stack.clone(); for (int i=0; i&lt;stack.size(); i++) { tempStack = (Stack) stack.clone(); int value = (Integer) stack.pop(); if (!stack.isEmpty()) { for (int k=0; k&lt;tempStack.size(); k++) { int tmp = (Integer) tempStack.pop(); if ((value + tmp) == x) { System.out.println("Indices " + i + " &amp; " + k + " with values " + value + " &amp; " + tmp); } } } } } } </code></pre> <p>The following is my array based solution:</p> <pre><code>public class 1 { public static void main(String[] args) { int x = 100; int [] array = {20,3,400,80,30,70,20,47,28,38,41,53,20}; for (int i=0; i&lt;array.length; i++){ int temp1 = array[i]; for (int k=1; k&lt;array.length; k++) { int temp2 = array[k]; if ((temp1+temp2)==x) System.out.println("Indices " + i + " &amp; " + k + " with values " + temp1 + " &amp; " + temp2); } } } } </code></pre>
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    1. COBasically Stack are used for grammar checking for programming languages (in compilers ) and for some service policy implementations such as LIFO.In you case Stack in not the best data structure.
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      1. USEshan Sudharaka
 

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