how to add two numbers using stack in java

[raamay]

hi guys, great to be back in this site after a long time. well, i am learning java and want to add two numbers using stack.
int a= 123;
int b=4567;
i want each of the values to read one by one and push to the stack. so i will have one stack to store "a" value and another to store "b" value. then i want to add the top of stack values and store it in third stack and then once the operation is over, i need to print out the result from the third stack.

please enlighten me!

[r035198x]

What have you tried?

[raamay]

Ok, the following code is missing only the remainder. I want to know how to add a remainder of previous operation to new operation. suppose below 7+6=13, i've pushed the 3 to stack and now i want the 1 to be added to (6+2)+1=9

package practical;
import java.util.*;


public class StackAddAB {
	public static void main(String[] args){
		int a = 1226;
		int b = 4567;
		int result = 0;
		
		a = reverseNum(a);
		b = reverseNum(b);
		
		Stack<Integer> stacka = new Stack<Integer>();
		Stack<Integer> stackb = new Stack<Integer>();
		Stack<Integer> stackc = new Stack<Integer>();
		
		push(stacka, a);
		push(stackb, b);
		
		while (!stacka.empty() && !stackb.empty()) {
		result = addValues(stacka, stackb);
		
		push(stackc, result);
		}
		
		System.out.println("Stack A: " + stacka);
		System.out.println("Stack B: " + stackb);
		System.out.println("Stack C: " + stackc);

	}
	static void push(Stack<Integer> st, int v){

		while (v > 0){
			st.push(v);			
		    v = v / 10;
		    }
		}
	static void pop(Stack<Integer> st) {
		st.pop();
		}
	static Integer addValues(Stack<Integer> sta, Stack<Integer> stb){
		int res=0, val = 0, rem=0, x, y;

		//while (!sta.empty() && !stb.empty()) {
		x = sta.pop();
		y = stb.pop();
	    
		res = x+y+rem;
	    
	    val = res%10;
	    if(res>9){
	        rem = 1;
		}
	    else{
	    	rem = 0;
	    }
	    
	    System.out.println("Value: "+val+" Remainder: "+rem);
		
		return val;		
	}
	static Integer reverseNum(int num){
		int revNum=0;
		while (num != 0) {
		    revNum = revNum * 10 + num % 10;
		    num = num / 10;   
		}
		return revNum;
	}
}

[r035198x]

Are you allowed to use java.util.Stack or are you supposed to write your own stack implementation?

[raamay]

its not a task assigned but i am learning it just to see how i can perform stack operations