fork download
copy 
  1. #include <algorithm>
  2. #include <iostream>
  3. #include <sstream>
  4. #include <string>
  5. #include <vector>
  6.  
  7. void get_ip_as_str(std::string& ip) {
  8.     do {
  9.         std::cout << "Please input an IP address:" << std::endl;
  10.         std::cin >> ip;
  11.     } while (std::count(ip.begin(), ip.end(), '.') != 3);
  12. }
  13.  
  14. void split(const std::string& input,const std::string& sep,std::vector<std::string>& output) {
  15.     int l = 0, r, len = input.length();
  16.  
  17.     for (;;) {
  18.         r = input.find(sep, l);
  19.         if (r == std::string::npos) break;
  20.         output.push_back(input.substr(l, r - l));
  21.         l = r + 1;
  22.     }
  23.     if (l != len) output.push_back(input.substr(l, len - l));
  24. }
  25.  
  26. void store_ip_as_int(std::string& in_ip, unsigned int& out_ip) {
  27.     std::vector<std::string> ip;
  28.     unsigned char *p = (unsigned char *) (&out_ip);
  29.  
  30.     split(in_ip, ".", ip);
  31.     while (ip.size() != 0) {
  32.         int i;
  33.         std::istringstream iss(*ip.begin());
  34.         iss >> i;
  35.         *p = i;
  36.         ++p;
  37.         ip.erase(ip.begin());
  38.     }
  39. }
  40.  
  41. int main(int argc, char *argv[]) {
  42.     std::string in_ip;
  43.     unsigned int out_ip;
  44.     unsigned char *p;
  45.     p = (unsigned char *) &out_ip;
  46.  
  47.     get_ip_as_str(in_ip);
  48.     store_ip_as_int(in_ip, out_ip);
  49.  
  50.     std::cout << "IP integer: " << out_ip << std::endl;
  51.     std::cout << "IP address: " << (int) p[0] << "." << (int) p[1] << "." << (int) p[2] << "." << (int) p[3] << std::endl;
  52.  
  53.     return 0;
  54. }
Success #stdin #stdout 0.02s 2868KB
comments (?)
stdin
copy 
0.0.0.0
stdout
copy 
Please input an IP address:
IP integer: 0
IP address: 0.0.0.0
https://ideone.com/dSDR1
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!