how to extract specific integers in a mixed string-integer line in c++ -

i reading text file in c++, example of lines in it:

remove 1 2 cost 13.4 

how disregard things except 2 integers after remove, "1" , "2" , put them in 2 integer variable?

my incomplete code:

ifstream file("input.txt"); string line; int a, b;  if(file.is_open()) {    while (!file.eof())    {       getline (file, line);       istringstream iss(line);       if (line.find("remove") != string::npos)       {                 iss >> >> b;      // not work, not sure how                               // write code here       }    }  } 

here few options:

1. use stringstream created line find remove token , parse next 2 integers. in other words, replace this:

   if (line.find("remove") != string::npos) {           iss >> >> b;      // not work, not sure how                         // write code here } 

   with this:

   string token; iss >> token;  if (token == "remove") {     iss >> >> b; } 

2. create stringstream rest of line (6 length of "remove" token).

   string::size_type pos = line.find("remove");  if (pos != string::npos) {          istringstream iss(line.substr(pos + 6));      iss >> >> b; } 

3. call seekg method on line stringstream set input position indicator of stream after "remove" token.

   string::size_type pos = line.find("remove");  if (pos != string::npos) {          iss.seekg(pos + 6);      iss >> >> b; }