c++ - parsing a text file with first line all 1's and second line all 2's -

i have created program take file read text file line-by-line, , separate out individual words in each line (as separated blanks). want able edit code tokens first line 1's , tokens second line 2's if 1 me please down below code:

#include <iostream> using std::cout; using std::endl;  #include <fstream> using std::ifstream; #include <cmath> #include <string>  const int max_chars_per_line = 512; const int max_tokens_per_line = 20; const char* const delimiter = " "; using namespace std; int main() {     string filename;   // create file-reading object  /*std::ifstream file1("file1.txt", ios_base::app); std::ifstream file2("file2.txt");  std::ofstream combinedfile("combinedfile.txt"); combinedfile << file1.rdbuf() << file2.rdbuf();*/    ifstream fin;   //enter in file name combinedfile.txt   cout <<"please enter file name (including .txt)";   cin >> filename ;   fin.open(filename); // open file   if (!fin.good())      return 1; // exit if file not found    // read each line of file   while (!fin.eof())   {     // read entire line memory     char buf[max_chars_per_line];     fin.getline(buf, max_chars_per_line);      // parse line blank-delimited tokens     int n = 0; // for-loop index      // array store memory addresses of tokens in buf     const char* token[max_tokens_per_line] = {}; // initialize 0      // parse line     token[0] = strtok(buf, delimiter); // first token     if (token[0]) // 0 if line blank     {       (n = 1; n < max_tokens_per_line; n++)       {         token[n] = strtok(0, delimiter); // subsequent tokens         if (!token[n]) break; // no more tokens       }     }      // process (print) tokens     (int = 0; < n; i++) // n = #of tokens       cout << "token[" << << "] = " << token[i] << endl;     cout << endl;   }   system("pause");   return 0; } 

so output should this:

token[1] = token[1] = course token[1] = provides token[1] = detailed token[1] = coverage token[1] = of token[1] = token[1] = concepts token[1] = , token[1] = syntax  token[2] = coverage token[2] = includes token[2] = inheritance, token[2] = overloaded token[2] = operators, token[2] = overloaded token[2]= default token[2] = operators, 

if want separate words 2 containers such first contains words first line, , second contains words second line, can use vectors store them , string streams extract words line of text:

#include <sstream> #include <string> #include<vector> #include<fstream> using namespace std;  int main() {     ifstream infile("test.txt");     string line;     string word;     vector< vector<string> >  tokens(2);     (int ix = 0; ix < 2; ++ix)     {             getline(infile, line);         istringstream iss(line);         while(iss >> word)             tokens[ix].push_back(word);     }    } 

here, tokens[0] vector containing words first line, , tokens[1] contains words second line.