Question

C++ Please

• Write a function to copy one stack to another stack and leave the first stack unchanged.
• Only use the stack member functions:
  • push
  • pop
  • top
  • empty
• Your program should:
  • create a stack
    • prompt the user for a list of names and add them to the stack
  • create a second stack
  • call a function to copy the contents of the first stack to the second stack (leaving the first stack unchanged)
  • empty the contents of the first stack (displaying the names)
  • empty the contents of the second stack (displaying the names)
  • after the stacks have been emptied/displayed - purposely try to pop/remove a name from one of the empty stacks
    • ensure you have proper exception handling for attempting to pop/remove from an empty stack.

Answer 1

code

#include <bits/stdc++.h>
using namespace std;

// copystack take first stack as value and second as refernece
void copystack(stack<string> a,stack<string> &b){
   stack<string> c;
   // transfer the contens of a to c then finall transfer the contents of c to b

   while(!a.empty()){
       c.push(a.top());
       a.pop();

   }

   while(!c.empty()){
       b.push(c.top());
       c.pop();
   }

}
// function for printing a stack
void printstt(stack<string> &st){
   while(!st.empty()){
       cout<<st.top()<<" ";
       st.pop();
   }
   cout<<endl;
}

int main(){
   int n;
   cout<<"enter number of names";
   cin>>n;
   string s;
   stack<string> st;
   while(n--){
       cin>>s;
       st.push(s);
   }

   stack<string> b;
   copystack(st,b);
  
   printstt(st);
   printstt(b);

   if(!b.empty()){
       b.pop();
   }
}

screenshot

sample output

please help if it helped. Feel free to ask any query.