teststack.c

/*
 * =====================================================================================
 *
 *       Filename:  concatenate_lists.c
 *
 *    Description:  Concatenates 2 linked lists of characters
 *
 *        Version:  1.0
 *        Created:  2013年01月07日 11時38分00秒
 *       Revision:  none
 *       Compiler:  gcc
 *
 *         Author:  Pellaeon Lin (), 
 *   Organization:  
 *
 * =====================================================================================
 */
#include <stdlib.h>
#include <stdio.h>

struct listnode {
	char data;
	struct listnode *nextnode;
};

typedef struct listnode Listnode;
typedef Listnode *ListnodePtr;
int concatenate ( ListnodePtr *, ListnodePtr * );
int insertnode ( ListnodePtr *, char );
int printlist ( ListnodePtr *);

int main () {

	// Arrays used for initializing lists
	char list1[5] = { 'A', 'B', 'C', 'D', 'E' };
	char list2[5] = { 'V', 'W', 'X', 'Y', 'Z' };

	// Create 2 Listnodes
	ListnodePtr Aptr;
	ListnodePtr Bptr;

	int i;
	for ( i=0; i<=5; i++) {
		insertnode( &Aptr, list1[i] ); //Initialize listnodeA
		insertnode( &Bptr, list2[i] ); //Initialize listnodeB
	}

	//concatenate( &Aptr, &Bptr );
	printlist( &Aptr );
}

int insertnode ( ListnodePtr *nodePtr, char value ) {
	ListnodePtr newptr = NULL;
	newptr = malloc( sizeof(Listnode) );

	if ( newptr != NULL ) {
		newptr->data = value;
		newptr->nextnode = (*nodePtr);
		(*nodePtr) = newptr;
	}
}

int printlist ( ListnodePtr *nodePtr ) {
	ListnodePtr currentptr;
	currentptr = *nodePtr;
	while ( currentptr->nextnode != NULL ) {
		printf("'%c' --> ", currentptr->data);
		currentptr = currentptr->nextnode;
	}
	puts("NULL");
}