how to input IP address?

Hope this is easy.

I can't seem to find/recall how to have a program accept the input of an IP address/subnet.

For instance:

If I am asking for someones name in the program, i would write something along these lines:

1
2
3

string getName = "";

cout << "Enter Your Name: "

So how do I do this simply to get an IP or something such as a dotted quad? I am pretty sure I would not use string for that, correct?

SakurasouBusters (732)

You can simply input four integers along with three dot characters. (Hints : 7 cin statements in total)

Last edited on

alewurm (7)

I couldn't do that. part of the program, afterward is having to convert said IP address into 32 bit integer, so it would have to be altogether.

SakurasouBusters (732)

std::string str_ip = "Please enter a correct IP address : ";
cout << str_ip; cin >> str_ip;

std::stringstream ss(str_ip);
int v = 0, n = 3; uint32_t real_ip;
while(true)
{
    if(ss >> v && n >= 0)
    {
         char c;
         ((uint8_t*)&real_ip)[n] = v;
         ss >> c;
    } else break;
    n--;
}

cout << "The IP address entered : " << real_ip << endl;

Please enter a correct IP address : 124.186.205.63
The IP address entered : 2092617023

Last edited on

JLBorges (13770)

Use inet_pton unix: http://man7.org/linux/man-pages/man3/inet_pton.3.html
or InetPton windows: https://msdn.microsoft.com/en-us/library/windows/desktop/cc805844(v=vs.85).aspx

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how to input IP address?