在顺序表中使用顺序查找法查找某个关键字

//顺序表中顺序查找(SeqSearch)
#include
#include
#define MAX 100
#include
typedef struct
{
	int data[MAX];
	int length;
}SeqList;
int SeqSearch(SeqList* S, int key)//key为要查找的值
{
	printf("关键字序列：");
	for (int j = 0; j < S->length; j++)
	{
		printf("%d ",S->data[j]);
	}
	int i = 0;//i作为一个计数器用于顺序查找
	S->data[S->length] = key;//设置哨兵（即待查找值）在顺序表的末尾
	printf("\n查找%d所比较的关键字:\n",key);
	while (S->data[i] != key)
	{
		printf("%d ",S->data[i]);
		i++;
	}
	if (i < S->length)
	{
		printf("\n元素%d的位置是%d\n", key, i);
		return (i + 1);
	}
	else
	{
		return -1;
	}

}

int main(int argc, char* argv[])
{
	int a[10] = { 3, 6, 2, 10, 1, 8, 5, 7, 4, 9 };
	int n = sizeof(a) / sizeof(a[0]);
	SeqList* S = (SeqList*)malloc(sizeof(SeqList));
	assert(S);
	for (int i = 0; i < n; i++)
	{
		S->data[i] = a[i];
	}
	S->length = n;
	SeqSearch(S, 5);

	return 0;
}