在顺序栈的销毁过程中出现未经异常的处理

Question

在顺序栈的销毁过程中出现未经异常的处理

下面是入口

下面是相关代码

```c
typedef struct  //创建顺序栈
{
    int* base;
    int* top;
    int stacksize;
}SqStack;

bool InitStack(SqStack* &s)//初始顺序栈
{
    s = (SqStack*)malloc(MAXSIZE * (sizeof(SqStack)));
    if (!s->base)
    {    
        return false;
    }
    s->top = (int*)-1;
    s->stacksize = MAXSIZE;

    return true;
}

// 销毁栈，释放栈空间，栈顶栈底指针置为NULL，长度置为0
bool DestroyStack(SqStack* &s)
{    
    free(s->base);
    s->base = s->top = NULL;
    s->stacksize = 0;
    return true;
}

Answer 1

因为你初始化的时候没有给base分配空间

bool InitStack(SqStack* &s)//初始顺序栈
{
    s = (SqStack*)malloc(MAXSIZE * (sizeof(SqStack)));
    s->base = (int *)malloc(MAXSIZE * (sizeof(int)));
    if (NULL == s->base)
    {    
        return false;
    }
if (NULL == s)
    {    
        return false;
    }
    s->top = (int*)-1;
    s->stacksize = MAXSIZE;
 
    return true;
}