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authormo khan <mo.khan@gmail.com>2020-07-04 13:04:54 -0600
committermo khan <mo.khan@gmail.com>2020-07-04 13:04:54 -0600
commit24700ade3ae9ff643b0c092ff617fb065d9f19f1 (patch)
tree186b70d02e3c9ab11c54ea9d3ff81f167ec6148f /src/01/06/stack_test.c
parente93f71c94f7f70b759cd442fa7d66c2a25ee3800 (diff)
Switch 06 and 01b
Diffstat (limited to 'src/01/06/stack_test.c')
-rw-r--r--src/01/06/stack_test.c168
1 files changed, 0 insertions, 168 deletions
diff --git a/src/01/06/stack_test.c b/src/01/06/stack_test.c
deleted file mode 100644
index b34c191..0000000
--- a/src/01/06/stack_test.c
+++ /dev/null
@@ -1,168 +0,0 @@
-#include <cgreen/cgreen.h>
-
-/*
-Implement the stack methods using two queues
-
-* `push(x)`
-* `pop()`
-
-Analyze the running time of the `push(x)` and `pop()` operations based on this implementation.
-*/
-
-struct node {
- int data;
- struct node *next;
-};
-
-typedef struct node Node;
-
-typedef struct {
- Node *head;
- int size;
-} Queue;
-
-typedef struct {
- Queue *q1;
-} Stack;
-
-static Queue *newQueue(){
- Queue *queue = malloc(sizeof(Queue));
- queue->size = 0;
- queue->head = NULL;
- return queue;
-}
-
-static Stack *initialize() {
- Stack *stack = malloc(sizeof(Stack));
- stack->q1 = newQueue();
- return stack;
-}
-
-Node *newNode(int data) {
- Node *node = malloc(sizeof(Node));
- node->data = data;
- node->next = NULL;
- return node;
-}
-
-void enqueue(Queue *q, int data) {
- Node *node = newNode(data);
- q->size++;
-
- if (q->head == NULL) {
- q->head = node;
- } else {
- Node *tail = q->head;
-
- while (tail->next != NULL)
- tail = tail->next;
- tail->next = node;
- }
-}
-
-int dequeue(Queue *q) {
- if (q->head == NULL) return -1;
-
- Node *node = q->head;
- int data = node->data;
-
- q->head = node->next;
- free(node);
- return data;
-}
-
-// The running time is linear time.
-static void push(Stack *stack, int data) {
- enqueue(stack->q1, data);
-}
-
-// The running time is linear time.
-static int pop(Stack *stack) {
- int count = stack->q1->size - 1;
- Queue *tmp = newQueue();
-
- for (int i = 0; i < count; i++)
- enqueue(tmp, dequeue(stack->q1));
-
- int data = dequeue(stack->q1);
- free(stack->q1);
- stack->q1 = tmp;
- return data;
-}
-
-int size(Stack *stack) {
- return stack->q1->size;
-}
-
-static void destroy(Stack *stack) {
- int count = size(stack);
-
- for (int i = 0; i < count; i++)
- pop(stack);
-
- free(stack->q1);
- free(stack);
-}
-
-static void inspect(Queue *q) {
- Node *tmp = q->head;
-
- if (q->size == 0) {
- printf("[]\n");
- return;
- }
-
- printf("[");
- for (int i = 0; i < q->size; i++) {
- printf("%d,", tmp->data);
- tmp = tmp->next;
- }
- printf("\b]\n");
-}
-
-Describe(Stack);
-BeforeEach(Stack){ }
-AfterEach(Stack){ }
-
-Ensure(Stack, push_onto_stack) {
- Stack *stack = initialize();
-
- push(stack, 1);
- assert_that(size(stack), is_equal_to(1));
-
- push(stack, 2);
- assert_that(size(stack), is_equal_to(2));
-
- destroy(stack);
-}
-
-Ensure(Stack, pop_single_item) {
- Stack *stack = initialize();
-
- push(stack, 1);
-
- assert_that(pop(stack), is_equal_to(1));
- destroy(stack);
-}
-
-Ensure(Stack, pop_successive_items) {
- Stack *stack = initialize();
-
- push(stack, 1);
- push(stack, 2);
-
- assert_that(pop(stack), is_equal_to(2));
- assert_that(pop(stack), is_equal_to(1));
-
- destroy(stack);
-}
-
-TestSuite *stack_tests() {
- TestSuite *suite = create_test_suite();
-
- add_test_with_context(suite, Stack, push_onto_stack);
- add_test_with_context(suite, Stack, pop_single_item);
- add_test_with_context(suite, Stack, pop_successive_items);
-
- return suite;
-}