字符串的serching文本

Question

我正在编写一个小程序，用户可以搜索美国的国家公园。我所有的公园都有他们所处的州以及其他特征。目前我只有一个用户将会看到所有公园以及他们所在的州，他们建立的年份以及他们的网站。但是，我希望用户能够按州搜索公园，但我无法确定如何在文本文件中搜索状态字符串并仅显示这些公园。这是我到目前为止所拥有的。 `

#include<iostream>
#include<cmath>
#include<iomanip>
#include<string>
#include <fstream>

using namespace std;

int main()
{
    string parkname = "";
    string city = "";
    string state = "";
    string phone = "";
    string website = "";
    string famousfor = "";
    int yearestablished = 0;
    double dailyfee = 0;
    int sqyards = 0;
    char hikingtrails = ' ';
    char skiing = ' ';
    char wildernesscamp = ' ';
    char canoing = ' ';
    char kayaking = ' ';
    char guidedtours = ' ';
    char allseason = ' ';

    ifstream inFile;
    inFile.open("nationalparks.txt");
    if (inFile.is_open())
    {
        cout << "Park Name" << setw(25) << "City" << setw(31) << "State" << setw(41) << "Year Established" << setw(19) << "Website" << endl;
        getline(inFile, parkname, '#');
        getline(inFile, city, '#');
        getline(inFile, state, '#');
        inFile >> yearestablished;
        inFile.ignore();
        getline(inFile, phone, '#');
        getline(inFile, website, '#');
        inFile >> dailyfee;
        inFile.ignore();
        inFile >> sqyards;
        inFile.ignore();
        inFile >> hikingtrails;
        inFile.ignore();
        inFile >> skiing;
        inFile.ignore();
        inFile >> wildernesscamp;
        inFile.ignore();
        inFile >> canoing;
        inFile.ignore();
        inFile >> kayaking;
        inFile.ignore();
        inFile >> guidedtours;
        inFile.ignore();
        inFile >> allseason;
        inFile.ignore();
        getline(inFile, famousfor);
        while (!inFile.eof())
        {
            cout << parkname << setw(30) << city << setw(30) << state << setw(28) << yearestablished << setw(40) << website << setw(30) << endl;
            cout << left;
            getline(inFile, parkname, '#');
            getline(inFile, city, '#');
            getline(inFile, state, '#');
            inFile >> yearestablished;
            inFile.ignore();
            getline(inFile, phone, '#');
            getline(inFile, website, '#');
            inFile >> dailyfee;
            inFile.ignore();
            inFile >> sqyards;
            inFile.ignore();
            inFile >> hikingtrails;
            inFile.ignore();
            inFile >> skiing;
            inFile.ignore();
            inFile >> wildernesscamp;
            inFile.ignore();
            inFile >> canoing;
            inFile.ignore();
            inFile >> kayaking;
            inFile.ignore();
            inFile >> guidedtours;
            inFile.ignore();
            inFile >> allseason;
            inFile.ignore();
            getline(inFile, famousfor);

        } inFile.close();
    }
    system("pause");
    return 0;
}

我希望用户能够输入例如alaska并仅显示这些公园。我认为字符串搜索可以工作，但我对如何做它有点困惑。