SGU-302. BHTML 1.0

primo_001

于 2012-11-10 21:52:28 发布

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分类专栏： sgu

本文链接：https://blog.youkuaiyun.com/primoblog/article/details/8170160

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#include <iostream>
#include <stack>
#include <string>
using namespace std;
stack<int> zhan;
int main ()
{
    string s1, s2;
    while(cin>>s1)
    {
        s2.clear();
        for(int i = 0; i < (int)s1.length(); i++)
        {
            if(s1[i] == '<'&&s1[i+1] == 'U'){zhan.push(1); i+=3;}
            else if(s1[i] == '<'&&s1[i+1] == 'D'){zhan.push(-1); i+=5;}
            else if(s1[i] == '<'&&s1[i+1] == '/'){zhan.pop(); i+=(s1[i+2] == 'U'?4:6);}
            else
            {
                if(zhan.empty())s2+=s1[i];
                else if(zhan.top() == 1)
                s2+=(s1[i]-=((s1[i]>='A'&&s1[i]<='Z')?0:32));
                else if(zhan.top() == -1)
                s2+=(s1[i]+=((s1[i]>='a'&&s1[i]<='z')?0:32));
            }
        }
        cout<<s2<<endl;
    }
    return 0;
}

思路较简单，不做多余解释》