stack例子

#include<stack>
#include<iostream>
using namespace std;

int main()
{
    stack<char> initStack;
    char ch;
    while(cin>>ch)
    {
        if(ch==‘(‘||ch==‘{‘||ch==‘[‘)
        {
             initStack.push(ch);
             continue;
        }
        if(!initStack.empty())
        {
            char value=initStack.top();
            if(ch==‘)‘&&value==‘(‘)
                initStack.pop();
            else if(ch==‘}‘&&value==‘{‘)
                initStack.pop();
            else if(ch==‘]‘&&value==‘[‘)
                initStack.pop();
            else
            {
                cout<<"不匹配"<<endl;
                 return -1;
            }

        }
    }
    if(initStack.empty())
        cout<<"匹配"<<endl;
    else
        cout<<"不匹配"<<endl;
    return 0;
}