CODEWITHSUNDEEP
javaoutputtoken
Rose
Rose

Reputation: 19

How to delete the last token in the system.out.println?

I have this snippet of code and the output is coming out to be 4x^3 + 3x^2 + -5x^0 + 3x^5 + 4x^4 + 1x^3 + -4x^2 + 4x^1 + 2x^1 + -5x^0 + 3x^2 + 4x^3 + -4x^0 + 4x^3 + 5x^4 +.

Can someone please help get rid of the last + at the end?

Here's the code:

public static void Iterate(PolyDS result) { 

    NodeClass node = result.getFirstNode();

    while(node!= null) {


        System.out.print(node.getCoeff() + "x" + "^" + node.getExpo() + " + ");
        node = node.getNext();
    }
}

Upvotes: 0

Views: 84

Answers (2)

Tim Biegeleisen
Tim Biegeleisen

Reputation: 521194

One option is to peek ahead to the next value of node in the loop, and to print a connecting + only when the next node is not null:

NodeClass node = result.getFirstNode();

while (node != null) {
    String msg = node.getCoeff() + "x" + "^" + node.getExpo();
    node = node.getNext();
    msg += node != null ? " + " : "";

    System.out.print(msg);
}

Upvotes: 1

Kartik
Kartik

Reputation: 7917

Change

System.out.print(node.getCoeff() + "x" + "^" + node.getExpo() + " + ");
node = node.getNext();

to

System.out.print(node.getCoeff() + "x" + "^" + node.getExpo());
if(node.hasNext()) System.out.print(" + ");
node = node.getNext();

Ideally you should use something like while(node.hasNext()).

Upvotes: 1

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