SUM

#include<stdio.h>
#include<stdlib.h>

typedef struct node
{
    int a;
    struct node *next;

} node;

node *head;
void insert_end(int aN)
{
    node *N=(node*)malloc(sizeof(node));
    N->a=aN;
    N->next=NULL;
    if(head==NULL)
    {
        head=N;
    }
    else
    {
        node *list=head;
        while(list->next!=NULL)
        {
            list=list->next;
        }
        list->next=N;
    }
}

void display()
{   int sum=0,x;
    node*list=head;
    while(list!=NULL)
    {   x=list->a;
        sum=sum+x;
        list=list->next;
    }
    printf("SUM IS: %d\n",sum);
}
int main()

{
    int n,x,i;
    head=NULL;
    printf("Input the Number of Node:");
    scanf("%d",&n);
    for(i=0; i<n; i++)
    {
        scanf("%d",&x);
        insert_end(x);

    }
    display();

    return;
}