Question

I’ve just realized that I’ve never learned to read strings from file, so I did a little messing around to figure it out, but I’m having a problem with my compiler.

For my programming class I use visual c++ 2010 because it is required and it hasn’t given me much problem so I haven’t switched to any other.

Anyways heres my code and my problem.
It is basically supposed to read in full names from a file and store them in an array.

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

int main()
{
 const int maxsize = 100;
 string friendArray[maxsize];

 ifstream friends;
 friends.open("myFriends.dat");

 int sub = 0;

 while (friendArray[sub] <= 100)
 {
   getline(friends, friendArray[sub]);
   sub++;
 }

}

in my while loop, I am recieving: error: no operator “<=” matches these operands.

I’m getting the same thing with any other operators I use also.
Any help?

Answer 1

You want this instead:

while (sub < 100)

Originally, you were comparing a string to an integer literal. You obviously can’t do that.

Note that I also changed the <= to < otherwise, you’ll be overrunning the array.