// Word Jumble
// The classic word jumble game where the player can ask for a hint

#include <iostream>
#include <string>
#include <cstdlib>
#include <ctime>

using namespace std;

int main()
    enum fields {WORD, HINT, NUM_FIELDS};
    const int NUM_WORDS = 5;
    const string WORDS[NUM_WORDS][NUM_FIELDS] =
        {"abbott", "part of colton's name"},
        {"glasses", "These might help you see the answer."},
        {"labored", "Going slowly, is it?"},
        {"persistent", "Keep at it."},
        {"mississippi", "It's a state."}

	int choice = (rand() % NUM_WORDS);
    string theWord = WORDS[choice][WORD];  // word to guess
    string theHint = WORDS[choice][HINT];  // hint for word

    string jumble = theWord;  // jumbled version of word
    int length = jumble.size();
    for (int i=0; i<length; ++i)
        int index1 = (rand() % length);
        int index2 = (rand() % length);
        char temp = jumble[index1];
        jumble[index1] = jumble[index2];
        jumble[index2] = temp;
    cout << "\t\t\tWelcome to Word Jumble!\n\n";
    cout << "Unscramble the letters to make a word.\n";
    cout << "Enter 'hint' for a hint.\n";
    cout << "Enter 'quit' to quit the game.\n\n";
    cout << "The jumble is: " << jumble;
    string guess;
    cout << "\n\nYour guess: ";
    cin >> guess;

    while ((guess != theWord) && (guess != "quit"))
        if (guess == "hint")
            cout << theHint;
            cout << "Sorry, that's not it.";

        cout <<"\n\nYour guess: ";
        cin >> guess;

    if (guess == theWord)
        cout << "\nThat's it!  You guessed it!\n";

    return 0;

Please use code tags.
I'm not sure what you mean by repeat the program, but it looks like you are since your using a while loop.

Just add a while loop at the beginning of the code and close it at the end. This is a simple way to allow repetition of a program.

char again='y';
    while(again == 'y')
    {   //execute the program

cout<<"Would you like to run again?"<<endl;
        }//close while loop