CCF认证201509-3模板生成系统

整体思路为：读入模板时识别所有变量，两边各加两个大括号处理之后，赋值为空串存入unordered_map；读入变量的同时进行处理，两边各加两个大括号，对已存入的进行修改。之后用每个变量遍历模板，寻找并替换即可。

#include <iostream>
#include <algorithm>
#include <string>
#include <cstdio>
#include <cstring>
#include <vector>
#include <sstream>
#include <map>
#include <set>
#include <unordered_map>
using namespace std;
unordered_map<string, string> mp;
int main()
{
    int m, n;
    string a[110];
    cin>>m>>n;
    getchar();
    for(int i = 0 ; i < m ; ++i)
    {
        string temp;
        getline(cin, temp);
        int begin = 0, end = 0;
        while((begin = temp.find("{{ ", begin)) != string::npos)
        {
            if((end = temp.find(" }}", begin)) == string::npos)
                break;
                        end += 3;
           // cout<<end <<" "<< begin<<endl;
            mp[temp.substr(begin, end - begin)] = "";
            begin += 3;
        }
        a[i] = temp;
    }
    for(int i = 0 ; i < n ; ++i)
    {
        string temp1, temp2, temp3;
        getline(cin, temp1);
        int k = 0;
        if((k = temp1.find(" ", 0)) == string::npos)
        {
            temp2 = temp1;
            temp3 = "";
        }
        else
        {
            temp2 = temp1.substr(0, k);
            temp3 = temp1.substr(k + 2, temp1.length() - k - 3);
        }
        temp2 = "{{ "+temp2+" }}";
        mp[temp2] = temp3;
    }
    for(unordered_map<string, string>::iterator it = mp.begin() ; it != mp.end() ; ++it)
    {
        for(int j = 0 ; j < m ; ++j)
        {
            int k = 0;
            while((k = a[j].find(it->first, k)) != string::npos && k < a[j].length())
            {
                a[j].replace(k, it->first.length(), it->second);
                k += it->first.length();
            }
        }
    }
    for(int i = 0 ; i < m ; ++i)
    {
        cout<<a[i]<<endl;
    }
}

来源：CSDN

作者：Sho.Sakurai

链接：https://blog.csdn.net/weixin_41414657/article/details/104267836