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import React, { useState } from 'react';

const quizData = [
  {
    question: 'What is the capital of France?',
    options: ['London', 'Paris', 'Berlin', 'Madrid'],
    correctAnswer: 'Paris'
  },
  {
    question: 'What is 2 + 2?',
    options: ['3', '4', '5', '6'],
    correctAnswer: '4'
  }
  // Add more questions as needed
];

function QuizApp() {
  const [currentQuestion, setCurrentQuestion] = useState(0);
  const [selectedAnswer, setSelectedAnswer] = useState('');
  const [score, setScore] = useState(0);
  const [quizCompleted, setQuizCompleted] = useState(false);

  const handleAnswerSelect = (answer) => {
    setSelectedAnswer(answer);
  };

  const handleNextQuestion = () => {
    if (selectedAnswer === quizData[currentQuestion].correctAnswer) {
        setScore(score + 1);
      }
      setSelectedAnswer('');
      setCurrentQuestion(currentQuestion + 1);
  };

  const handlePreviousQuestion = () => {
    setCurrentQuestion(currentQuestion - 1);
    setSelectedAnswer('');
  };

  const handleSubmitQuiz = () => {
    setQuizCompleted(true);
  };

  return (
    <div className="max-w-md mx-auto mt-8 p-4 bg-white shadow-md rounded-md">
      {quizCompleted ? (
        <div>
          <h2 className="text-xl font-bold mb-4">Quiz completed!</h2>
          <p>Your score: {score}/{quizData.length}</p>
        </div>
      ) : (
        <div>
          <h2 className="text-xl font-bold mb-4">Question {currentQuestion + 1}</h2>
          <p className="mb-4 text-lg">{quizData[currentQuestion].question}</p>
          <ul className="mb-4">
            {quizData[currentQuestion].options.map((option, index) => (
              <li key={index} className="mb-2">
                <label className="inline-flex items-center">
                  <input
                    type="radio"
                    value={option}
                    checked={selectedAnswer === option}
                    onChange={() => handleAnswerSelect(option)}
                    className="form-radio text-indigo-600 h-5 w-5 mr-2"
                  />
                  {option}
                </label>
              </li>
            ))}
          </ul>
          {
            currentQuestion !== quizData.length - 1 && <button
            onClick={handleNextQuestion}
            className="bg-indigo-500 text-white py-2 px-4 rounded-md hover:bg-indigo-600 m-2"
          >
            Next
          </button>
          }
          
          
          {currentQuestion === quizData.length - 1 && (
            <button
              onClick={handleSubmitQuiz}
              className="bg-indigo-500 text-white py-2 px-4 rounded-md hover:bg-indigo-600 m-2"
            >
              Submit
            </button>
          )}
          { currentQuestion >= 1 && <button
            onClick={handlePreviousQuestion}
            className="bg-indigo-500 text-white py-2 px-4 rounded-md hover:bg-indigo-600 m-2"
          >
            Prev
           </button>
          }
        </div>
      )}
    </div>
  );
}

export default QuizApp;
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