利用栈实现的（）。。匹配c++程序

yeah！加油！

 

#include <iostream>
#include <stack>
 using namespace std;
 int main()
{
    stack<char> a;
    char input;
    cout<<"Please input your chars:\n";
    while(cin>>input&&(input=='('||')'||'['||']'))
    {
        switch(input){
            case '(':
                a.push(input);
                break;
            case '[':
                a.push(input);
                break;
            case ')':
                if(a.top()=='(')
                    a.pop();
                break;
            case ']':
                if(a.top()=='[')
                    a.pop();
                break;
            default:
                    break;
        }}
    if(a.empty())
        cout<<"Matching success!";
    else
        cout<<"Matching fail.";
    
    return 0;
}