括号匹配有问题

#include<stdlib.h>

#include"MyStack.h"

int main()

{

//括号存放栈

MyStack<char> *p = new MyStack<char>(30);

//括号急需匹配栈

MyStack<char> *pNeed = new MyStack<char>(30);

char str[] = "[()]";

char need = 0;

for (int i = 0; i < strlen(str);i++){

if (str[i] != need){

cout << "第" << i+1 << "次入第一个栈:";

p->push(str[i]);

cout << str[i] << endl;   

switch (str[i]){

case'[':

if (need != 0){

cout << "第" << i + 1 << "次入另一个栈:";

pNeed->push(need);

cout << need<<endl;

}

need = ']';

break;

case'(':

if (need != 0){

cout << "第" << i + 1 << "次入另一个栈:";

pNeed->push(need);

cout << need << endl;;

}

need = ')';

break;

default:

cout << "字符串不匹配" << endl;

system("pause");

return 0;

}

}

else{

char elem=0;

p->pop(elem);

cout << "elem:" << elem<<"  ";

if (!pNeed->pop(need)){

cout << "need:" << need << endl;

need = 0;

}

}

}

if (p->EmptyStack()){

cout << "字符串括号匹配" << endl;

}

else{

cout << "字符串括号不匹配" << endl;

}

delete p;

p = NULL;

delete pNeed;

p = NULL;

system("pause");

return 0;

}

从运行结果可以看出： ‘）’ 这个符号根本没有进入第二个栈  ，但结果判定正确的标准是第一个栈空。