console system() c++ infinite loop while trying to do ipconfig - c++

Question

I'm currently learning c++ from scratch, I've previously developed apps with C# using Visual Studio but I'm a total noob with C++, I'm trying to make a small console exe that releases and renews the ip while practicing using headers and differents .cpp files.
The issue is that when I run the local windows debugger from visual studio 2015 the code runs perfectly and does everything I'm trying to. But when I build and try to run the .exe file it goes into an infinite loop stating endlessly the output from the std::cout <<"Realizando ipconfig Release", I have localized the issue to when it tries to run the system("ipconfig /release"). Why does this happen? and How can I fix it?
This is the header
#pragma once
#ifndef HeaderIp
#define HeaderIp
int Release();
int Renew();
#endif // !HeaderIp
This is the release.cpp
#include <stdlib.h>
int Release()
{
if (system(nullptr)==0)
{
return 0;
}
else
{
system("ipconfig /release");
return 1;
}
}
This is the renew.cpp
#include <stdlib.h>;
int Renew()
{
if (system(nullptr)==0)
{
return 0;
}
else
{
system("ipconfig /renew");
return 1;
}
}
and finally this is the ipconfig.cpp
#include <iostream>
#include <stdlib.h>
#include "HeaderIp.h"
#include <stdio.h>
int main()
{
std::cout << "Realizando ipconfig Release" << std::endl;
int i = 0; //Bit de informacion de status de CPU
i = Release();
if (i == 0)
{
std::cout << "Error al liberar IP" << std::endl;
system("pause");
exit;
}
else
{
std::cout << "Ip Liberado correctamente" << std::endl;
}
i = Renew();
if (i == 0)
{
std::cout << "Error al renovar IP" << std::endl;
system("pause");
exit;
}
else
{
std::cout << "Ip renovado correctamente" << std::endl;
}
system("pause");
return 0;
}

Answer 1

It's unusual, and indeed generally discouraged to use system in C++. If you were to manage DHCP leases using IpReleaseAddress and IpRenewAddress, instead, you might find your problem disappears.
You can use std::cin.sync() instead of system("pause"), too.
exit; probably doesn't do what you want it to, as you're only referring to the function, you're not calling it, so... it'll do nothing.
The semicolon in #include <stdlib.h>; is an error, and you should be including <cstdlib> and <cstdio> rather than <stdlib.h> and <stdio.h>.