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DSL

8: Problem statement:
Write C++ program for storing binary number using doubly linked lists. Write functions-
a) to compute 1‘s and 2‘s complement b) add two binary numbers

#include <iostream>

#include<vector>

using namespace std;

struct node

{

int data;

node* next;

node* prev;

};

node* Create(int x)

{

node* temp=new node;

temp->data=x;

temp->next=NULL;

temp->prev=NULL;

return temp;

}

void Insert(node** head,int x)

{

node *temp=Create(x);

if(*head==NULL)

{

*head=temp;

}

else {

(*head)->prev=temp;

temp->next=*head;

*head=temp;

}

}



void print(node* head)

{

node* temp=head;

cout<<"\ndata: ";

while(temp!=NULL)

{

cout<<temp->data<<" ";

temp=temp->next;

}

cout<<endl;

}

int sum(int a,int b,int c)

{

return a^b^c;

}

int carry(int a,int b,int c)

{

int x=a*b;

int y=b*c;

int z=c*a;

int s=sum(x,y,z);

return s;

}

node* get_sum(node** head1,node** head2,node** result)

{

* result=NULL;

node* temp1=*head1;

node* temp2=*head2;

int c=0;

while(temp1!=NULL && temp2!=NULL)

{

int s=sum(temp1->data,temp2->data,c);

c=carry(temp1->data,temp2->data,c);

Insert(result,s);

temp1=temp1->next;

temp2=temp2->next;

}

Insert(result,c);

return *result;

}

int flip(int x)

{

if(x == 1)

return 0;

return 1;

}

node* first_comp(node** head,node** result)

{

node* temp=*head;

*result=NULL;

while(temp!=NULL)

{

Insert(result,flip(temp->data));

temp=temp->next;

}

return *result;

}

int main() {

int ch,n,m;

node* pnode,*qnode,*rnode,*res,*flip,*twos;

node* p;

p=NULL;

pnode=qnode=rnode=flip=res=twos=NULL;

cout<<"Enter size of first list : "<<endl;

cin>>n;

do{

cout<<"\tWelcome\n";

cout<<" 1.Create List 1\n";

cout<<" 2.Create List 2\n";

cout<<" 3.1's compliment\n";

cout<<" 4.2's compliment\n";

cout<<" 5.Binary Addition\n";

cout<<" 6.Exit\n";

cout<<"Enter your choice : \n";

cin>>ch;

switch (ch)

{

case 1:

cout<<"Enter elements in first node."<<endl;

for(int i=0;i<n;++i) {

cin>>m;

Insert(&pnode, m);

//print(pnode);

}

cout<<"printing first list : ";

print(pnode);

break;

case 2:

cout<<"Enter elements in second node."<<endl;

for(int i=0;i<n;++i) {

cin>>m;

Insert(&qnode, m);

}

break;

case 3:

flip=first_comp(&pnode,&flip);

print(flip);

break;

case 4:

for(int i=0;i<n;++i){

if(i<n-1)

Insert(&p,0);

else

Insert(&p,1);

}

twos=get_sum(&flip,&p,&twos);

print(twos);

break;

case 5:

res=get_sum(&pnode,&qnode,&res);

print(res);

break;

}

}while (ch>=1 && ch<=6);

return 0;

}

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