Question

Hi， can you teach me a way to multiply the data in a linked list by a number? With C++

I will be very appreciated!

Answer 1

//header files
#include <iostream>
#include <cstdlib>
using namespace std;

//structure to contain the data and the pointer
struct node {
   int data;
   struct node *next;
};

//creating a head pointer of the list pointing to null
struct node* head = NULL;
//creating a new node and inserting the element
void insert(int data){
   //calculating the size of the node
   struct node* newNode = (struct node*) std::malloc(sizeof(struct node));
   //inserting the data to the node
   newNode->data = data;
   //assinging the pointer to point to the new node
   newNode->next = head;
   head = newNode;
}
//function to show the element in the list
void show(){
   //creating a pointer to point the head of the list
   struct node* pointer=head;
   //while the pointer value is not null, show all the element in the list
   while (pointer != NULL) {
       cout<< pointer->data <<" ";
       pointer = pointer->next;
   }
}
//function to multiply the element in the list
void multiply(){
   //variable to store the number
   int num;
   struct node* point=head;
   //asking user to input the number
   cout<<"\nEnter the number to multiply: ";
   cin>>num;
   //accessing all node untill the pointer is null
   while (point!= NULL) {
       //fetch the data field and multiply by the number
       point->data = point->data * num;
       //move the pointer to next node
       point = point->next;
   }
}

//main method
int main(){
   //inserting the element in the list
   insert(23);
   insert(21);
   insert(8);
   insert(4);
   insert(11);
   insert(29);
   insert(18);
   //showing the element in the list
   cout<<"The element in the linked list are: ";
   show();
   //calling the function to multiply the element in the list
   multiply();
   //showing the element in the list after the implementation
   cout<<"\nThe element in the linked list after multiplying are: ";
   show();
   return 0;
}

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Output: