#include "SeqList.h"
void Seqlistprint(SL* ps)
{
	for (int i = 0; i < ps->size; i++)
	{
		printf("%d ", ps->a[i]);
	}
	printf("\n");
}

void SeqListinit(SL *ps)
{
	ps->a = NULL;
	ps->size = ps->capacity = 0;
}
void SeqListinit(SL* ps)
{
	free(ps->a);
	ps->a = NULL;
	ps->capacity = ps->size = 0;
}

void SeqListpushback(SL* ps, SLDataType x)//尾插
{
	if (ps->size == ps->capacity)//没有空间或者满了则扩容
	{
		int newcapacity = ps->capacity == 0 ? 4 : ps->capacity * 2;//0的话是4，非零*2；
		SLDataType* tmp = realloc(ps->a, newcapacity * sizeof(SLDataType));
		
		if (tmp == NULL)
		{
			printf("realloc fail\n");
			exit(-1);
		}
		
		//开空间成功了
		ps->a = tmp;
		ps->capacity = newcapacity;
	}


	ps->a[ps->size] = x;//在尾部插入数据
	ps->size++;
}
void SeqListpopback(SL* ps)//尾删
{
	ps->a[ps->size - 1] = 0;
	ps->size--;

}
void SeqListpushfront(SL* ps, SLDataType x);
void SeqListpopfront(SL* ps);