Pinging an IP ? [Solved]

Posts 1–11 of 11 · Page 1 of 1

Back with another question.

I want to ping 8.8.8.8 (google DNS) to assure I am online, but I am not positive of the commands / syntax of the "if" statement. I'm aware this isn't correct, but what I mean is:

Code:

int main()
{
	system("ping 8.8.8.8");
		if(pingSuccess == 1) {do this}
}

pingSuccess is not a variable in my code, I'm not sure if I need one or there is a command to detect true/false from the closest command? Then I can code the rest. Yeah, it's simple. Yeah, I could do it in a batch file. But there's no harm in learning new syntax / commands.

Don't need full source codes, since I didn't tell you what this is for. It's a surprise.

EDIT: Here's my new source:

Code:

#include "stdafx.h"
#include <iostream>
#include <string>
#include <windows.h>

using namespace std;

static string host;
static string ping_again;

void _doPing()
{
     system("cls");
     cout << "Enter the IP you wish to ping: ";
     cin >> host;
     system (("ping " + host).c_str());
     cout << endl;
     cout << "(Y)es  (N)o\n\n";
     cout << "Ping another host: ";
     cin >> ping_again;
     if (ping_again == "Y" || ping_again == "y")
     {
     system("cls");
     ping();
     }
     else if (ping_again == "N" || ping_again == "n")
     {
     system("exit");
     }
}

int main()
{
     ping();

     return(0);
}

EDIT2: I still need to have an if statement that will execute commands if successfully pinged the user-inputted IP.

[highlight=c]#include "stdafx.h"
#include <iostream>
#include <string>
#include <windows.h>
using namespace std;
static string host;
static string ping_again;
void Ping()
{
cout << "Enter IP you wish to ping: ";
cin >> host;
int result = system (("ping " + host+ " > nul").c_str() );
if (result==0)
{
cout << "Connected successfully to " + host + "." << endl << endl;
}
else
{
cout << "Couldn't connect to " + host + "." << endl << endl;
}
cout << "[Y]es [N]o -> ";
cout << "Ping another host: ";
cin >> ping_again;
if (ping_again == "Y" || ping_again == "y")
{
system("cls");
Ping();
}
else
{
system("exit");
}
}
void main()
{
Ping();
}[/highlight]

Originally Posted by Hassan

Hmm I logged off for the night, but this worked flawlessly. ^_^ Thanks again, life saver.

EDIT: Can I ask what the .c_str() means?

Originally Posted by BobFM

Hmm I logged off for the night, but this worked flawlessly. ^_^ Thanks again, life saver.

EDIT: Can I ask what the .c_str() means?

NP.

c_str generates same content in the string representation as the expression that called it, but returns it as a pointer to an array of characters.

/Marked Solved.

Originally Posted by Hassan

NP.

c_str generates same content in the string representation as the expression that called it, but returns it as a pointer to an array of characters.

Ah, sounds useful. Last question, can I set the amount of retries to ping the IP? I was going to try a while loop and if it isn't complete pinging, would move on to a new function and execute the "failed" statement. ( if (result==1) )

EDIT: Didn't see your mark solved..sorry bout that.

Originally Posted by BobFM

Yup. You can. That's where Result variable becomes useful:

[highlight=c]#include <iostream>
#include <conio.h>
#include <Windows.h>
#include <cstdio>
#include <string>
using namespace std;
static string host;
static string ping_again;
void Ping()
{
cout << "Enter IP you wish to ping: ";
cin >> host;
int NumberofRetries =5;
int result ;
result = system (("ping " + host+ " > nul").c_str() );
for (int i = 1 ;i <= NumberofRetries; i++)
{
if (result != 0)
{
cout << endl << "Retrying... [" << i << "/" << NumberofRetries << "]";
result = system (("ping " + host+ " > nul").c_str() );
if (result==0)
break;
}
}
if (result==0)
{
cout << endl << "Connected successfully to " + host + "." << endl;
}
else
{
cout << endl << "Couldn't connect to " + host + "." << endl << endl;
}
cout << "[Y]es [N]o -> ";
cout << "Ping another host: ";
cin >> ping_again;
if (ping_again == "Y" || ping_again == "y")
{
system("cls");
Ping();
}
else
{
system("exit");
}
}
void main()
{
Ping();
}[/highlight]

The original question is answered. That's why it is marked solved. You may ask more related questions. No problem in that.