IP updater

#include <iostream>
#include <string>
#include <fstream>
#include <vector>

using namespace std;

int main()
{
    std::cout << "\n    Finding your Ipv4 address... \n\n";
    system("ipconfig | findstr IPv4 > ipconfigOutput.txt");

    std::ifstream ipconfigOutput("ipconfigOutput.txt");
    std::string tempIpconfigOutput;
    string finalIpOutput = "";
    string onlyIp;
    while (ipconfigOutput >> tempIpconfigOutput) {
        finalIpOutput += tempIpconfigOutput;
    }
    ipconfigOutput.close();
    system("del ipconfigOutput.txt");
    // get only the IP.
    onlyIp = finalIpOutput.substr(23, finalIpOutput.size() - 23);

    std::cout << "    Your IP is: " << onlyIp << "\n\n\n    Checking the IP in your \"server.properties\" file...\n\n";

    // check for the ip in server.properties file
    ifstream serverProperties("server.properties");
    if (!serverProperties) exit(EXIT_FAILURE);
    string tempServerOutput;
    string finalServerOutput = "";
    string onlyServerIp = "";
    while (serverProperties >> tempServerOutput) {
        if (tempServerOutput.substr(0, 9) == "server-ip")
            finalServerOutput = tempServerOutput;
    }
    serverProperties.close(); // close the file.

    onlyServerIp = finalServerOutput.substr(10, finalServerOutput.size() - 10); // get only the IP itself.

    cout << "    The IP in your server.properties is: " << onlyServerIp << "\n\n\n";

    if (onlyIp == onlyServerIp) { // if they are the same, nothing is needed to be changed.
        cout << "    Your server.properties and your local IP address are the same. you dont need to do anything. goodbye!\n";
        cout << " Press Any Key To Exit.";
        system("pause >nul");
        exit(EXIT_SUCCESS);
    }

    //if they aint the same...
    cout << "    Whoopsie! your local ip address and your server.properties one are NOT the same.\n";
    cout << "    This could be a problem. Would you like me to fix that for you? (Y/n): ";
    char answer;
    cin >> answer;
    if (answer == 'N' || answer == 'n') {
        cout << "    You can fix it manually then. just open your \"server.properties\" file and change it.\n";
        cout << "Press Any Key To Exit...\n";
        system("pause >nul");
        exit(EXIT_SUCCESS);
    }
    cout << "    Great. I will fix it now.\n";

    ofstream newServerP("server.properties", ios::app);
    newServerP << "server-ip=" << onlyIp << '\n';
}