isipsup

#include <iostream>
#include <sstream>
#include <stdlib.h>
#include <unistd.h>
using namespace std;
int main(){
    string s,ip;
    for(int i=0; i < 5; i++){
        s="ping -c1 ";
        ip="10.6.15.";
        /////
        //
        int a= 111+i;
        //
        ///
        stringstream ss;
        ss << a;
        string str = ss.str();
        ip.append(str);
        s.append(ip);
        s.append(" > /dev/null");
        usleep(3000000); // micro sec
        int retval = system(s.c_str());
        cout<< ip << " .. " << ((retval==0)?"up":"down" ) << endl;
    }
    // 0 - success
    // 256 - packet lost either system down or ip not reachable
    // 512 - unknown host 0 < ip < 256
    return 0;
}