[bo]不知道为什么不管输入正确或错误的表达式运行结果都是括号不匹配！我写的代码帮我看看哪里错了，先谢谢了[/bo]

#include<iostream.h>
#include<stdio.h>
#include<stdlib.h>
#include<malloc.h>
#include<math.h>
#include<conio.h>
#include<process.h>

#define TURE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define STACK_INIT_SIZE 100;
#define STACKINCREMENT 10;

typedef int Status;
typedef char sElemType;
typedef int Boolean;

typedef struct{
    sElemType *base;
    sElemType *top;
    int stacksize;
}SqStack;

Status InitStack(SqStack &S)
{
    S.base = (sElemType *)malloc(100 * sizeof(sElemType));
    if(!S.base) exit(OVERFLOW);
    S.top = S.base;
    S.stacksize = STACK_INIT_SIZE;
    return OK;
}

Status StackEmpty(SqStack &S)
{
    if(S.top==S.base)
        return TURE;
    else
        return FALSE;
}

Status GetTop(SqStack S, sElemType &e)
{
    if(S.top == S.base) return ERROR;
    e = * (S.top - 1);
    return OK;
}

Status Push(SqStack &S, sElemType e)
{
    if(S.top - S.base >= S.stacksize)
    {
        S.base = (sElemType *)realloc(S.base,(S.stacksize + 10) * sizeof(sElemType));
        if(!S.base)   exit(OVERFLOW);
        S.top = S.base + S.stacksize;
        S.stacksize += STACKINCREMENT;
    }
       *S.top++ = e;
        return OK;
}

Status Pop(SqStack &S, sElemType &e)
{
    if(S.top = S.base)   return ERROR;
    e = * --S.top;
    return OK;
}

void check()
{
    SqStack S;
    InitStack(S);
    sElemType ch[50];
    sElemType *p,e;
    gets(ch);
    p = ch;   //要习惯用工作指针
    while(*p)
    
        switch(*p)
        {
        case '(':  
        case '[':   
        case '{': Push(S,*p++);  //左括号入栈同时q++
            break;
        case ')':
        case ']':
        case '}': if(!StackEmpty(S))
                  {
                      Pop(S,e);
                      if(!(e=='('&&*p==')'||e=='['&&*p==']'||e=='{'&&*p=='}'))
                          cout<<"括号不匹配!"<<endl;
                      exit(ERROR);
                  }
                 else
                 {
                      cout<<"缺少左括号!"<<endl;
                      exit(ERROR);
                 }
                 break;
        default: p++;
        }
    if(StackEmpty(S))
        cout<<"括号匹配!"<<endl;
    else
        cout<<"缺少右括号!"<<endl;
}

void main()
{
    cout<<"请输入带括号的表达式:"<<endl;
    check();
}