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program to Convert a Decimal Number to Binary Number using Stacks

program to Convert a Decimal Number to Binary Number using Stacks

This C++ program, using a stack, displays the bits of a binary number when the corresponding decimal number is entered as input.

    #include <iostream>

    #include <stdio.h>

    #include <conio.h>

    using namespace std;

    struct node

    {

        int data;

        node *next;

    }*top = NULL, *p = NULL, *np = NULL;

    int x;

    void push(int n)

    {

        np = new node;

        np->data = n;

        np->next = NULL;

        if (top == NULL)

        {

            top = np;

        }

        else

        {

            np->next = top;

            top = np;

        }

    }

    int pop()

    {

        if (top == NULL)

        {

            cout<<"underflow\n";

        }

        else

        {

            p = top;

            top = top->next;

            x = p->data;

            delete(p);

            return(x);

        }

    }

    int main()

    {

        int n, a;

        cout<<"enter the decimal number\n";

        cin>>n;

        while (n > 0)

        {

            a = n % 2;

            n = n / 2;

            push(a);

        }

        p = top;

        cout<<"resultant binary no:";

        while(true)

        {

            if (top != NULL)

    	    cout<<pop()<<"\t";

    	else

    	    break;

        }

        getch();

    }

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