Lab08, Exercise 4, complete

Labs/Lab08/Makefile

 CC=gcc
 CFLAGS=-Wall -Werror
-all: strnode_test
+all: strnode_test node_test
 strnode_test: strnode.o strnode_test.o strnode.h
 clean:
 	rm -f strnode_test *.o
+node_test: node.o node_test.o node.h
+clean:
+	rm -f node_test *.o
+

Labs/Lab08/node.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "node.h"
+struct node *node_create(void* data, int size){
+	struct node* newNode = (struct node*)malloc(sizeof(struct node));
+	newNode->data = (char*)malloc(size);
+	strcpy(newNode->data, data);
+	newNode->next = NULL;
+	return newNode;
+}
+
+void node_destroy(struct node *n){
+	free(n->data);
+	free(n);
+}

Labs/Lab08/node.h

+#ifndef NODE_H_
+#define NODE_H_
+
+struct node{
+	void* data;
+	struct node* next;
+};
+
+struct node *node_create(void* data, int size);
+void node_destroy(struct node *n);
+#endif

Labs/Lab08/node_test.c

+#include <stdio.h>
+#include <string.h>
+#include "node.h"
+
+// global variables (data segment)
+
+struct node *n1, *n2, *n3, *p;
+
+//------------ MY MAIN FUNCTION --------------------
+
+int main(int argc, char *argv[]) {
+
+  // create strnodes
+  n1 = node_create("hello", 6);
+  n2 = node_create("there", 6);
+  n3 = node_create("prof", 5);
+
+  printf("node_test running...\n");
+
+  // manually "link" the nodes together.
+  n1->next = n2;
+  n2->next = n3;
+  n3->next = NULL;
+
+  // p points to node n1 initially
+  p = n1;
+
+  while (p != NULL) {
+    // Complete this line to print the current node's string and   
+    // the stored length (do not use strlen!)
+    printf("str: %s - length: %zu\n",  (char*)p->data, strlen(p->data));
+
+    // TODO: add code to move p to point to next node
+    // until you add this line, this program will have an infinite loop.
+	node_destroy(p);
+	p = (*p).next;
+  }
+  p = NULL;
+  return 0;
+}