Thread: Increment operator

public class Stack1 {
 
	int stack_elements[] = new int[10];
	int top_element;
 
	Stack1() {
		top_element = -1;
	}
 
	void push (int i){
		if (top_element == 9) 
			System.out.println("Stack is full");
		else
			stack_elements[++top_element] = i; (Please tell me why if I write top_element + 1 won't give me the same result as ++top_element)
	}
 
	int pop() {
		if (top_element < 0) {
			System.out.println("Stack is empty");
			return 2;
		}
		else 
			return stack_elements[top_element--];
 
	}
 
}

Do you have a question about the posted code?

I don't like to look at unformatted code.

Please edit your post and wrap your code with code tags:

[code]
**YOUR CODE GOES HERE**
[/code]

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The expression: variable++ // changes the value of variable
The expression: variable + 1 // does NOT change the value of variable
The statement: variable = variable + 1; // changes the value of variable

if I write top_element + 1, why is the result is not same as ++top_element?

Yes those two expressions do not give the same result:
top_element + 1 does NOT change the value in top_element
++ top_element does change the value in top_element


What happened to the indentations for the posted code? Logically nested statements should have indentations.

If you want to use top_element + 1 Try this:

    stack_elements[top_element = top_element + 1]  // change value and use results