Single link list upto 20 number

Q : Write a program to create a link list. There should be 20 nodes in the list, each node contains an integer between 1-20. The list should be printed at the end.

Solution : 

#include<stdio.h>

typedef struct nlist

{

     int data;

     struct nlist *next;

}node;

node *start=NULL;

node* create(int);

void add(int);

int input();

void print();

void main()

{

     int opt,i;

     for(i=1;i<=20;i++)

     {

          printf("Enter %d position number>> ",i);

          add(input());

     }

     print();

    

}

node* create(int n)

{

     node *nw;

     nw=(node*) malloc(sizeof(node));

     nw->data=n;

     nw->next=NULL;

     return nw;

}

void add(int n)

{

     node *nw,*pt;

     nw=create(n);

     if(start==NULL)

          start=nw; /* First Element */

     else

     {

          for(pt=start;pt->next!=NULL;pt=pt->next)

          {

          }

          pt->next=nw;

     }

}

int input()

{

     int n;

     do

     {

          scanf("%d",&n);

          if(n>20)

              printf("\nInput in range of 1-20\n");

     }while(n>20);

     return n;

}

void print()

{

     node *pt;

     for(pt=start;pt!=NULL;pt=pt->next)

          printf("[%d] ",pt->data);

}

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