线性表C语言数组实现

// 线性表的数组实现，下标从0开始！
// 2019/12/1
// Leonwenbin

#include 
#include 

#define MAXLEN 100
#define ElementType int
#define Position int

struct LinearTable {
	ElementType elememts[MAXLEN];
	int last;
};

typedef struct LinearTable List;

List Create(ElementType arr[], int len) {
	List L;
	L.last = 0;
	for (int i = 0; i < len; i++) {
		L.elememts[i] = arr[i];
	}
	L.last = len - 1;
	return L;
}

List Insert(ElementType x, Position p, List L) {

	if (L.last >= MAXLEN - 1) {
		printf("Linear table is full\n");
		return;
	}
	if ((p > L.last + 1) || (p < 1)) {
		printf("Insert position is invalid\n");
		return;
	}

	for (Position q = L.last; q >= p; q--) {
		L.elememts[q + 1] = L.elememts[q];
	}
	L.last++;
	L.elememts[p] = x;
	return L;
}

List Delete(Position p, List L) {
	if (p > L.last || p < 1) {
		printf("Delete position is invalid\n");
		return;
	}
	L.last = L.last - 1;
	int temp = L.elememts[p];
	for (Position q = p; q <= L.last; q++) {
		L.elememts[q] = L.elememts[q + 1];
	}
	printf("Deleted element is:%d\n", temp);
	return L;
}

List DeleteAllSame(ElementType x, List L) {
	int cnt = 0;
	for (int i = 0; i <= L.last; i++) {
		if (L.elememts[i] == x) {
			for (int j = i + 1; j <= L.last; j++) {
				L.elememts[j - 1] = L.elememts[j];
			}
			cnt++;
		}
	}
	L.last -= cnt;
	return L;
}

Position Locate(ElementType x, List L) {
	for (Position p = 0; p <= L.last; p++) {
		if (L.elememts[p] == x) {
			return p;
		}
	}
	printf("The specified element doesn't exit\n");
	return -1;
}

ElementType Retrieve(List L, int index) {
	if (index > MAXLEN || index < 0 || index > L.last) {
		printf("Index is invalid\n");
		return -1;
	}
	return L.elememts[index];
}

List Reverse(List L) {
	if (L.last == 0 || L.last == 1) {
		return L;
	}

	int left = 0;
	int right = L.last;
	while (left <= right) {
		int temp = L.elememts[left];
		L.elememts[left] = L.elememts[right];
		L.elememts[right] = temp;
		left++;
		right--;
	}
	return L;
}

List destroy(List L) {
	L.last = 0;
	return L;
}

void printList(List L) {
	if (L.last == 0) {
		printf("Linear table is empty\n");
		return;
	}
	for (int i = 0; i <= L.last; i++) {
		printf("%d ", L.elememts[i]);
	}
	printf("\n");
}

int main(void) {
	ElementType arr[] = { 1,2,3,4,5 };
	int len = sizeof(arr) / sizeof(ElementType);
	List L = Create(arr, len);
	printList(L);
	printf("%d\n", L.last);

	L = Insert(11, 4, L);
	printList(L);
	printf("%d\n", L.last);
	L = Insert(11, 4, L);
	printList(L);
	printf("%d\n", L.last);
	L = Insert(11, 4, L);
	printList(L);
	printf("%d\n", L.last);

	L = Reverse(L);
	printList(L);

	L = Delete(6, L);
	printList(L);

	printf("DeleteAll:");
	L = DeleteAllSame(11, L);
	printList(L);
	
	printf("position = %d\n", Locate(1, L));

	printf("value[%d] = %d\n", 4, Retrieve(L, 4));
	L = destroy(L);
	printList(L);
	system("pause");
	return 0;
}