C++:从控制台保存信息，然后重新打开时，信息仍然存在

Question

我有一个程序可以将您最喜欢的游戏保存到列表中。我将如何做到这一点，以便在我关闭控制台并重新打开它时，列表仍然存在，并且数组中的所有元素都被保存？

using namespace std;

int main()
{
    vector<string> games;
    vector<string>::iterator iter;

    while(true)
    {
    system("cls");
    string response;
    cout << "\tFavorite Videos Games \n\n";
    cout << "Type 'add' to add a game.\n";
    cout << "Type 'remove' to remove a game.\n";
    cout << "Type 'list' to list all games.\n\n";
    cout << "Type 'quit' to close and save the program.";
    cout << "What would you like to do: ";
    cin >> response;
    cout << endl;

    if ((response == "add") || (response == "remove") || (response == "list"))
    {
        int number;
        string gameName;
        if(response == "add")
        {
            cout << "What is the name of the game you would like to add?\n";
            cout << "Name: ";
            cin >> gameName;
            games.push_back(gameName);
            cout << gameName << " was added to the system.\n\n";
            Sleep(2000);
            continue;
        }
         if(response == "remove")
        {
            vector<string>::iterator linesIn;
            int spacesIn;
            cout << "What game should be deleted?\n\n";
            cout << "All Games:\n-----------\n";
            for(iter = games.begin(); iter != games.end(); ++iter)
            {
                number ++;
                cout << number << ". " << *iter << endl;
            }
            cout << "Number: ";
            cin >> spacesIn;
            spacesIn = spacesIn -1;
            linesIn = games.begin() + spacesIn;
            cout << *linesIn << " was deleted.";
            games.erase(linesIn);
            Sleep(2000);

        }
         if(response == "list")
        {
            cout << "All Games:\n-----------\n";
            for(iter = games.begin(); iter != games.end(); ++iter)
            {
                number ++;
                cout << number << ". " << *iter << endl;
            }
            cout << "\n\nPress any key to continue...";
            getch();
        }

    }
    else if (response == "quit")
        break;
    else
    {
        cout << "\nInvalid action.\n\n";
        Sleep(2000);
        continue;
    }

    }
    return 0;
}

Answer 1

最简单的方法是将其保存到文件中。

示例来自 http://www.cplusplus.com/doc/tutorial/files/ :

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

int main () {
   ofstream myfile;
   myfile.open ("example.txt");
   myfile << "Writing this to a file.\n";
   myfile.close();
   return 0;
}

也许添加另一个名为保存的选项，然后遍历游戏并将它们添加到名为“mygames.txt”的文件中。

然后添加一个名为“加载保存的游戏”的选项并执行如下操作:

string line;
ifstream myfile ("example.txt");
if (myfile.is_open()){
while ( getline (myfile,line) ){
    games.push_back(line);
}
myfile.close();

显然，这些只是示例，但我觉得很清楚，您可以从这里获取它。