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Stack.cpp
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138 lines (128 loc) · 2.55 KB
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#include<iostream>
using namespace std;
struct node
{
int info;
node *link;
};
class stak
{
node *ptr,*top = NULL,*a;
int pos = 0 , x, item;
char ch='y';
public:
void push();
void pop();
void show();
void search();
};
void stak::push()
{
ch = 'y';
while(ch == 'y' || ch == 'Y')
{
cout<<"\nEnter element : ";
cin>>x;
ptr = new node;
ptr -> info = x;
ptr -> link = NULL;
if(top == NULL)
{
top = ptr;
}
else
{
ptr -> link = top;
top = ptr;
}
cout<<"\nWant to enter more elements?(y/n)...";
cin>>ch;
}
}
void stak::pop()
{
ch = 'y';
while(ch == 'Y' || ch == 'y')
{
if(top == NULL)
{
cout<<"\nUNDERFLOW!";
break;
}
a = top;
top = top -> link;
cout<<a->info<<" Deleted successfullly!\n ";
delete(a);
pos -= 1;
cout<<"\nWant to delete more?(y/n)...";
cin>>ch;
}
}
void stak::show()
{
pos = 0;
if(top == NULL)
{
cout<<"\nThe list is empty!";
return;
}
cout<<"\nThe List is : ";
while(top != NULL)
{
cout<<top->info <<"--> ";
top = top -> link;
pos++;
}
}
void stak::search()
{
int tmp;
ch ='y';
while(ch == 'y' || ch== 'Y')
{
tmp = pos;
cout<<"\nEnter element you want to search : ";
cin>>item;
ptr = top;
while( ptr != NULL)
{
if(item == ptr -> info)
{
cout<<"\nElement found at pos : "<<tmp;
break;
}
tmp -= 1;
ptr = ptr -> link;
}
if(ptr == NULL)
cout<<"\nElement not found!";
cout<<"\nWant to search any other element ?(y/n)...";
cin>>ch;
}
}
int main()
{
int choice;
stak o;
while(1)
{
cout<<"\n\tMENU\n1.Push\n2.Pop \n3.Show\n4. Search\n5. Exit";
cout<<"\nEnter your choice : ";
cin>>choice;
switch (choice)
{
case 1 : o.push();
break;
case 2 : o.pop();
break;
case 3 : o.show();
break;
case 4 : o.search();
break;
case 5 : exit(0);
default: cout<<"\nInvalid choice!";
break;
}
}
return 0;
}