数据结构C-1.顺序表

 1.定义指向结构体的指针

#include 
#include 

#define LIST_MAX_LENGTH 10

/**
 * Linear list of integers. The key is data.
 */
typedef struct SequentialList {
    int actualLength;

    int data[LIST_MAX_LENGTH]; //The maximum length is fixed.
} *SequentialListPtr;

 2.输出顺序表

/**
 * Output the list.
 */
void outputList(SequentialListPtr paraList) {
    for(int i = 0; i < paraList->actualLength; i++) {
        printf("%d ", paraList->data[i]);
    }// Of for i
    printf("\r\n");
}// Of outputList

3.输出顺序表的地址 

/**
 * Output the memeory for the list.
 */
void outputMemory(SequentialListPtr paraListPtr) {
    printf("The address of the structure: %ld\r\n", paraListPtr);
    printf("The address of actualLength: %ld\r\n", ¶ListPtr->actualLength);
    printf("The address of data: %ld\r\n", ¶ListPtr->data);
    printf("The address of actual data: %ld\r\n", ¶ListPtr->data[0]);
    printf("The address of second data: %ld\r\n", ¶ListPtr->data[1]);
}// Of outputMemory

4.初始化顺序表

/**
 * Initialize a sequential list. No error checking for this function.
 * @param paraListPtr The pointer to the list. It must be a pointer to change the list.
 * @param paraValues An int array storing all elements.
 */
SequentialListPtr sequentialListInit(int paraData[], int paraLength) {
	SequentialListPtr resultPtr = (SequentialListPtr)malloc(sizeof(struct SequentialList));
    if(!resultPtr->data) exit(0);//检查内存分配是否成功
	for (int i = 0; i < paraLength; i ++) {
		resultPtr->data[i] = paraData[i];
	}// Of for i
	resultPtr->actualLength = paraLength;

	return resultPtr;
}//Of sequentialListInit

 5.在顺序表中插入一个元素

/**
 * Insert an element into a sequential linear list.
 * @param paraListPtr The pointer to the list. It must be a pointer to change the list.
 * @param paraPosition The position, e.g., 0 stands for inserting at the first position.
 * @param paraValue The value to be inserted.
 */
void sequentialListInsert(SequentialListPtr paraListPtr, int paraPosition, int paraValue) {
    // Step 1. Space check.
    if (paraListPtr->actualLength >= LIST_MAX_LENGTH) {
        printf("Cannot insert element: list full.\r\n");
        return;
    }//Of if

    // Step 2. Position check.
    if (paraPosition < 0) {
        printf("Cannot insert element: negative position unsupported.");
        return;
    }//Of if
    if (paraPosition > paraListPtr->actualLength) {
        printf("Cannot insert element: the position %d is bigger than the list length %d.\r\n", paraPosition, paraListPtr->actualLength);
        return;
    }//Of if

    // Step 3. Move the remaining part.
    for (int i = paraListPtr->actualLength; i > paraPosition; i --) {
        paraListPtr->data[i] = paraListPtr->data[i - 1];
    }//Of for i

    // Step 4. Insert.
    paraListPtr->data[paraPosition] = paraValue;

    // Step 5. Update the length.
    paraListPtr->actualLength ++;
}// Of sequentialListInsert

6.在顺序表中删除一个元素

/**
 * Delete an element from a sequential linear list.
 * @param paraListPtr The pointer to the list. It must be a pointer to change the list.
 * @param paraPosition The position, e.g., 0 stands for inserting at the first position.
 * @return The deleted value.
 */
int sequentialListDelete(SequentialListPtr paraListPtr, int paraPosition) {
    // Step 1. Position check.
    if (paraPosition < 0) {
        printf("Invalid position: %d.\r\n", paraPosition);
        return -1;
    }//Of if

    if (paraPosition >= paraListPtr->actualLength) {
        printf("Cannot delete element: the position %d is beyond the list length %d.\r\n", paraPosition, paraListPtr->actualLength);
        return -1;
    }//Of if

    // Step 2. Move the remaining part.
	int resultValue = paraListPtr->data[paraPosition];
    for (int i = paraPosition; i < paraListPtr->actualLength; i ++) {
        paraListPtr->data[i] = paraListPtr->data[i + 1];
    }//Of for i

    // Step 3. Update the length.
    paraListPtr->actualLength --;

	// Step 4. Return the value.
	return resultValue;
}// Of sequentialListDelete

7.测试删除顺序表元素的函数 

/**
 * Test the delete function.
 */
void sequentialDeleteTest() {
	int tempArray[5] = {3, 5, 2, 7, 4};

    printf("---- sequentialDeleteTest begins. ----\r\n");

	// Initialize.
    SequentialListPtr tempList = sequentialListInit(tempArray, 5);
    printf("After initialization, the list is: ");
	outputList(tempList);

	// Delete the first.
    printf("Now delete the first, the list is: ");
	sequentialListDelete(tempList, 0);
	outputList(tempList);

	// Delete to the last.
    printf("Now delete the last, the list is: ");
	sequentialListDelete(tempList, 3);
	outputList(tempList);

	// Delete the second.
    printf("Now delete the second, the list is: ");
	sequentialListDelete(tempList, 1);
	outputList(tempList);

	// Delete the second.
    printf("Now delete the 5th, the list is: ");
	sequentialListDelete(tempList, 5);
	outputList(tempList);

	// Delete the second.
    printf("Now delete the (-6)th, the list is: ");
	sequentialListDelete(tempList, -6);
	outputList(tempList);

    printf("---- sequentialDeleteTest ends. ----\r\n");

	outputMemory(tempList);
}// Of sequentialDeleteTest

 8.在线性表中查找一个元素

(1)老师的

/**
 * Locate an element in the list.
 * @param paraListPtr The pointer to the list.
 * @param paraValue the indicated value.
 * @return The position of the value, or  -1 indicating not exists
 */
int locateElement(SequentialListPtr paraListPtr, int paraValue) {
	for (int i = 0; i < paraListPtr->actualLength; i ++) {
		if (paraListPtr->data[i] == paraValue) {
			return i;
		}// Of if
	}//Of for i

	return -1;
}// Of locateElement

 （2）我的

/**
 * Locate an element in the list.
 * @param paraListPtr The pointer to the list.
 * @param paraValue the indicated value.
 * @return The position of the value, or  -1 indicating not exists
 */
int locateElement(SequentialListPtr mylist, int value) {
	for (int i = 0; i < mylist->actualLength; i ++) {
		if (mylist->data[i] == value) {
			return i;
		}// Of if
	}//Of for i

	return -1;
}// Of locateElement

 9.对顺序表中的元素取值

(1)老师的

/**
 * Get an element in the list.
 * @param paraListPtr The pointer to the list.
 * @param paraPosition The given position.
 * @return The position of the value, or  -1 indicating not exists
 */
int getElement(SequentialListPtr paraListPtr, int paraPosition) {
    // Step 1. Position check.
    if (paraPosition < 0) {
        printf("Invalid position: %d.\r\n", paraPosition);
        return -1;
    }//Of if

    if (paraPosition >= paraListPtr->actualLength) {
        printf("Cannot delete element: the position %d is beyond the list length %d.\r\n", paraPosition, paraListPtr->actualLength);
        return -1;
    }//Of if

	return paraListPtr->data[paraPosition];
}// Of locateElement

 （2）我的

/**
 * Get an element in the list.
 * @param paraListPtr The pointer to the list.
 * @param paraPosition The given position.
 * @return The position of the value, or  -1 indicating not exists
 */
int getElement(SequentialListPtr mylist, int posnum) {
    //判断指定索引是否合法
    if(posnum<0 || posnum>=mylist->actualLength){
    return -1;}
	return paraListPtr->data[posnum];
}// Of locateElement

10.清空顺序表中的元素 

(1)老师的

/**
 * Clear elements in the list.
 * @param paraListPtr The pointer to the list.
 * @return The position of the value, or  -1 indicating not exists
 */
void clearList(SequentialListPtr paraListPtr) {
	paraListPtr->actualLength = 0;
}// Of clearList

 （2）我的

void clearList(SequentialListPtr paraListPtr) {
    free(paraListPtr);//释放内存
	paraListPtr->actualLength = 0;
}// Of clearList

 11.主函数

/**
 The entrance.
 */
void main() {
	sequentialInsertTest();
	sequentialDeleteTest();
}// Of main

12.获得元素前驱

int priorElement(SequentialListPtr mylist,int mylistvalue){
    //查找元素索引
    int index=locateElenment(mylist,mylistvalue)'
    //判断索引是否合法
    if(index<=0){
    printf("not found");
    return -1;
    }
    return mylist->data[index];
}