Searching text file for specific user-inputted string - c++

Question

I'm trying to write a program which opens a text file full of words (a "dictionary" minus the definitions) and stores these values in strings to compare them against a user input to determine whether the user input is spelled correctly.
I go the program to work and do what I wanted, but I can't seem to figure out one specific detail. I want the program to continue running until the user enters "exit" as an input. The only problem is that my program continues spewing out either "input is spelled correctly" or "input is not spelled correctly" ad infinitum without giving the user a chance to input more values in.
How do I make it so the program only outputs one of these two options only once and then prompts the user for another input instead of a never-ending stream of the same statement? Thank you in advanced!
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main()
{
string line; //holds values from txt file
string input; //holds user-inputted values
ifstream inputFile; //fstream operator declaration
bool isFound = false; //bool value to indicate if the string has been found
inputFile.open("dict.txt", ios::in);
if (inputFile)
{
cout << "Enter word to spellcheck (or exit to end)\n";
getline(cin, input);
while (input != "exit")
{
while (getline(inputFile, line))
{
if (input == line)
{
isFound = true;
break;
}
else
{
isFound = false;
}
}
inputFile.close();
if (isFound)
{
cout << input << " is spelled correctly.\n";
}
else
{
cout << input << " is not spelled correctly.\n";
}
}
if (input == "exit")
{
cout << "Ending program...\n";
}
}
else
{
cout << "Cannot open file\n";
}
return 0;
}

Answer 1

Inside the body of the
while (input != "exit")
loop the user is never asked to update the value of input. Moving getline(cin, input) into the while condition like this:
while (getline(cin, input) && input != "exit")
will solve that problem.
Then next problem is the handling of the dictionary file. It is closed in the middle of the loop, so subsequent reads from it will instantly fail. OP could reset the read pointer to the beginning of the file with inputFile.seekg(0);, but why reread the file every time.
Instead read the dictionary file into a std::set with more or less the same code as used in the search:
std::set<std::string> dictionary;
while (getline(inputFile, line))
{
dictionary.insert(line);
}
at the beginning of the program and search the set for the user's input in the loop.
if (dictionary.find(input) != dictionary.end())
{
cout << input << " is spelled correctly.\n";
}
else
{
cout << input << " is not spelled correctly.\n";
}

Answer 2

This should do the trick, you just need to move your getline block in the while loop, and move the file close statement outside the while loop:
#include <iostream>
#include <fstream>
#include <string>
#include <cstdio>
using namespace std;
int main()
{
string line; //holds values from txt file
string input; //holds user-inputted values
ifstream inputFile; //fstream operator declaration
bool isFound = false; //bool value to indicate if the string has been found
inputFile.open("dict.txt", ios::in);
if (inputFile)
{
while (input != "exit")
{
// Rewind file back to beginning every time
inputFile.clear();
inputFile.seekg(0,std::ios::beg);
cout << "Enter word to spellcheck (or exit to end)\n";
getline(cin, input);
while (getline(inputFile, line))
{
if (input == line)
{
isFound = true;
break;
}
else
{
isFound = false;
}
}
if (isFound )
{
cout << input << " is spelled correctly.\n";
}
else
{
if (input != "exit"){ // Don't print message if exiting
cout << input << " is not spelled correctly.\n";
}
}
}
if (input == "exit")
{
cout << "Ending program...\n";
}
inputFile.close();
}
else
{
cout << "Cannot open file\n";
}
return 0;
}