Question

I’m trying to compare a string with a const char*.

std::string line;
std::fstream tmpl;

I fill the string variable with some input from an fstream file using getline:

getline(tmpl, line);

and then I want to compare the line with something e.g.:

if(line == "$something")

for some reason it always returns false.
I tried a lot of different things already but without success (either having it return always false or always true)

Why and how do I fix this issue? Did I miss something? Is getline not the right approach?

Problem fixed using string.find(). I misused it when I tried different things. However the question about comparing with == is still open.

Answer 1

Ok Now try the below code…

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

int main () {
  string line;
  string sample ="hi";
  string datatoprocess ="";
  ifstream myfile ("example.txt");
if (myfile.is_open())
  {
    while ( myfile.good() )
    {
      getline (myfile,line);
      datatoprocess = datatoprocess + line;
    }
  unsigned found = datatoprocess.find(sample);
  if (found!=std::string::npos)
    std::cout << "Record Found";
    myfile.close();
  }
else cout << "Unable to open file"; 

  return 0;
}