c++ - Filter input received by getline -

#include <iostream> #include <string> #include <cstring> #include <fstream> using namespace std;  int main() {  string firstfile, secondfile, temp;  ifstream infile; ofstream outfile;  cout << "enter name of input file" << endl; cin >> firstfile;  cout << "enter name of output file" << endl; cin >> secondfile;  infile.open(firstfile.c_str()); outfile.open(secondfile.c_str());  while(infile.good()) {        getline(infile, temp, ' ');          if (   temp.substr(0,4) != "-----"             && temp.substr(0,5) != "header"              && temp.substr(0,5) != "subid#"             && temp.substr(0,5) != "report"             && temp.substr(0,3) != "date"             && temp             != ""             && temp             != "")          {             outfile << temp;         } }  infile.close(); outfile.close();  return 0;    } 

hi all. i'm attempting output lines text file not meet criteria in control structure -- i.e. no blank lines, no symbols, etc. however, when run code outputs everything, not taking consideration specifc requirements. if tell me i'm doing wrong appreciated.

if @ reference such this see second argument substr the number of character not ending position.

this means e.g. temp.substr(0,5) might return "heade" indeed not equal "header". means non-empty string output.

also note right now, don't read lines words separate input on space.