Removes duplicates from lines

remove_line_dups.cpp

#include <iostream>
#include <sstream>
#include <set>
#include <unordered_set>
#include<vector>
using namespace std;

int main() {
    #ifdef TESTING
    stringstream ss("10 yards of white lace burlap table runner\n"
                    "10 yards of no fray white lace burlap\n"
                    "10 yards of finished edge white lace burlap\n"
                    "10 yards of sewn white lace burlap\n"
                    "10 yards of sewn edge white lace burlap\n"
                    "10 yards of white lace burlap table runner\n"
                    "Sewn edges white lace burlap 10 yards\n"
                    "Finished edges white lace burlap 10 yards\n"
                    "White lace burlap no fraying\n"
                    "White lace burlap 10 yards no fraying\n"
                    "white lace burlap sashes for wedding\n"
                    "wedding white lace burlap sashes\n"
                    "wedding white lace burlap chair sashes\n");
    #else
    ifstream stream("file.txt");
    #endif
    unordered_set<string> unique_lines;
    for (string line; getline(ss, line); unique_lines.insert(line)) {
        if (!unique_lines.count(line)) {
            cout << line << endl;
        }
    }
}