typedef char DElemtype;
typedef struct StackNode
{
DElemtype data;
struct StackNode *next;

}StackNode,*LinkStack;

typedef struct Stack
{
LinkStack top;
int count;

}Stack;

int Push(Stack *s,DElemtype d)
{
LinkStack e=(LinkStack)malloc(sizeof(StackNode));
e->data=d;
e->next=s->top;
s->top=e;
s->count++;
return 1;

}

int mian(){
Stack *s;
DElemtype ch[100];

printf("请输入带有括号的表达式：");
scanf("%s",ch);
char *p=ch;

while(*p)
{
switch(*p){
case '(':
Push(&s,ch);

break;   
}}}


警告信息：    [Warning] passing argument 1 of 'Push' from incompatible pointer type
            [Warning] passing argument 2 of 'Push' makes integer from pointer without a cast

s本来就是指针，再加个&成指针的地址了。