求助程序哪里有问题？括号匹配问题

括号配对
#include<stdio.h>
#include<iostream.h>
#include<stdlib.h>
#include<string.h>
typedef char ElemType;
#define true 1
#define false 0
#define MaxSize 10
typedef struct
{
    ElemType data[MaxSize];
    int top;
}StType;
void InitStack(StType *&s)
{
    s=(StType *)malloc(sizeof(StType));
    s->top=-1;
}
void DestoryStack(StType *&s)
{
    free(s);
}
bool StackEmpty(StType *&s)
{
    return(s->top==-1);
}
bool Push(StType *&s,ElemType e)
{   if(s->top==MaxSize)
       return 0;
s->top++;
s->data[s->top]=e;
return 1;
}
bool Pop(StType *&s,ElemType &e)
{   if(s->top==-1)
       return 0;
e=s->data[s->top];
s->top--;
return true;
}
bool GetTop(StType *&s,ElemType &e)
{   if(s->top==-1)
       return false;
e=s->data[s->top];
return true;
}

bool Match(char exp[],int n)
{
    int i=0;char e;
    bool match=true;
    StType * st;
    InitStack (st);
    while(i<n&&match)
    {   if(exp[i]=='(')
        Push  (st,exp[i]);
     else if(exp[i]==')')
     { if(GetTop(st,e)==true)
        {
         if(e!='(')
        match=false;
     else
         Pop(st,e);
     }
     else match=false;
     }
     i++;
    }
    if(!StackEmpty(st))
        match=false;
    DestoryStack(st);
    return match;
}
int main()
{
char exp[20];
printf("请输入表达式：\n");
gets(exp);
if(Match(exp,strlen(exp)==1))
printf("表达式%s 括号配对\n",exp);
else
printf("表达式%s 括号不配对\n",exp);
return 0;
}