初学数据结构，vs显示错误使用了为初始化的局部变量p和m，求教如何改

Question

#include
#include

#define LIST_INIT_SIZE 100
#define LISTINCREMENT 10
#define TRUE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVERFLOW -2

typedef int ElemType;
typedef int Status;

typedef struct {

ElemType *elem;

int length;
int listsize;

}SqList;

Status InitList_Sq(SqList &L) {

L.elem = (ElemType *)malloc(LIST_INIT_SIZE * sizeof(ElemType));

if (!L.elem)exit(OVERFLOW);
L.length = 0;
L.listsize = LIST_INIT_SIZE;
return OK;

}//InitList_sq

Status ListInsert_Sq(SqList &L, int i, ElemType e) {

if (i < 1 || i >L.length + 1)return ERROR;

if (L.length >= L.listsize) {
    ElemType *newbase;
    newbase = (ElemType *)realloc(L.elem,
        (L.listsize + LISTINCREMENT) * sizeof(ElemType));
    if (!newbase)exit(OVERFLOW);
    L.elem = newbase;
    L.listsize += LISTINCREMENT;

}

int *q, *p;

q = &(L.elem[i - 1]);
for (p = &(L.elem[L.length - 1]); p >= q; --p)* (p + 1) = *p;

*q = e;
++L.length;
return OK;

}//ListInsert_sq

Status ListDelete_Sq(SqList &L, int i, ElemType e) {

if ((i < 1) || (i >L.length))return ERROR;

ElemType *q, *p;

q = &(L.elem[i - 1]);
e = *p;
q = L.elem + L.length - 1;

for (++p; p <= q; ++p)* (p + 1) = *p;

--L.length;
return OK;

}//ListDelete_Sq

Status CreatList(SqList &L) {
int a[4] = { 3,6,9,2 };
for (int j = 0; j < 4; j++)
{
ListInsert_Sq(L, j + 1, a[j]);

}
return OK;

}

void Print(SqList &L)
{ //打印顺序表的数据元素
printf("输出顺序表:\n");
for (int i = 0; i<L.length; i++)
printf("%d\n", L.elem[i]);
}

void main() {

SqList wsa;


InitList_Sq(wsa);
printf("初始化顺序表的长度%d: \n", wsa.length);
printf("创建固定数据元素的顺序表：\n", wsa.length);
CreatList(wsa);
Print(wsa);

ListInsert_Sq(wsa, 2, 56);
printf("在位序为2处插入56：\n", wsa.length);
Print(wsa);


int m;
ListDelete_Sq(wsa, 3, m);
printf("删除位序3的数据元素：\n", wsa.length);
Print(wsa);


system("pause");
CreatList(wsa);

}

Answer 1

变量在被使用之前，先要初始化，光声明是不行的。int m，ListDelete_Sq(wsa, 3, m)，这个变量m被声明了但没有被赋值，你把它传给一个函数，那这个m的值到底是多少呢？不能叫函数自己猜去啊。还有那个指针p,声明了但没赋值，然后直接引用e=*p。P的指向不明，又如何去引用？