Unsigned 32 bits IP address to string

ip2str.cpp

/*
g++ -std=c++11 ip2str.cpp -o ip2str
ip2str 0xb01a8c0 0x100007f
*/
#include <sstream>
#include <iostream>

using namespace std;

/* Simplest version */
string ipToStr2(uint32_t ip)
{
    stringstream ipStr;
    ipStr << (ip & 0xff) << ".";
    ipStr << ((ip >>8) & 0xff) << ".";
    ipStr << ((ip >>16) & 0xff) << ".";
    ipStr << ((ip >>24) & 0xff);
    return ipStr.str();
}

/* Shorter version */
string ipToStr(uint32_t ip)
{
    stringstream ipStr;
    for(short c = 0; c <= 24; c += 8){
        ipStr << ((ip >> c) & 0xff) << ((c < 24) ? "." : "");    
    }
    return ipStr.str();
}

int main(int argc, char* argv[])
{
    string buf;
    if(argc > 1){
        for(int c = 1; c < argc; c++){
            try{
                buf.assign(argv[c]);
                uint32_t a =stoul(buf, nullptr, 0);    
                cout << c << ": " << argv[c] << "(" << a << ") IP:" << ipToStr(a) << "\n";
            }catch(...){
                cout << c << ": Error at \"" << argv[c] << "\"\n"; 
            }
        }
    }else{
        cout << "Convert 32 bits to IP address string\nUsage: ip2str 0xb01a8c0 0x100007f\n";
    }
    return 0;
}