Quiz.js

src/Quiz.js

+import React from 'react';
+// import logo from './logo.svg';
+import './Quiz.css';
+
+
+const question = [
+  { Q: "6 X 4 ?", Choose: [6, 12, 18, 24], A: "" },
+  { Q: "3 + 3 ?", Choose: [2, 4, 6, 8], A: "" },
+  { Q: "3 - 1 ?", Choose: [1, 2, 3, 4], A: "" }
+]
+
+class Quiz extends React.Component {
+  constructor(props) {
+    super(props)
+    // this.setAnswer = this.setAnswer.bind(this)
+    this.setQuestion = this.setQuestion.bind(this)
+    this.ShowQuiz = this.ShowQuiz.bind(this)
+    this.state = { ...question[0], i: 0, v: "", r: 0, c: "" }
+  }
+  ShowQuiz() {
+    this.setState({ r: 1 })
+  }
+  setQuestion() {
+    this.setState({ ...question[this.state.i + 1], i: this.state.i + 1, v: "" })
+  }
+  // setAnswer(e) {
+  //   question[this.state.i]["A"] = e.target.value
+  //   this.setState({ v: e.target.value })
+  //   console.log(this.state)
+  //   console.log(question)
+  // }
+  render() {
+    if (this.state.r === 1) {
+      if (this.state.i === 3) {
+        return (
+          <div>
+            <h2>수고하셨습니다!</h2>
+          </div>
+        )
+      }
+      else {
+        return (
+          <div className="Quiz">
+            <h2>Q:{this.state.Q}</h2>
+            <div>① {this.state.Choose[0]}</div>
+            <div>② {this.state.Choose[1]}</div>
+            <div>③ {this.state.Choose[2]}</div>
+            <div>④ {this.state.Choose[3]}</div>
+            <div className="App">
+              정답을 입력하세요
+              <select>
+                <option hidden disabled selected>정답선택</option>
+                <option value={this.state.Choose[0]}>①</option>
+                <option value={this.state.Choose[1]}>②</option>
+                <option value={this.state.Choose[2]}>③</option>
+                <option value={this.state.Choose[3]}>④</option>
+              </select>
+            </div>
+            {/* <div>
+              <input type="text" value={this.state.v} name="A" onChange={this.setAnswer} />
+            </div> */}
+            {localStorage.setItem('Answer1', this.question[0].A),
+              localStorage.getItem('Answer1')}
+            <button type="button" onClick={this.setQuestion}>다음 문제로</button>
+          </div>
+        )
+      }
+    }
+    else {
+      return (
+        <div className="Box">
+          <div className="Main">
+            <h1> Calculus</h1>
+          </div>
+          <div className="Name">
+            이름을 입력하세요
+          <input onChange={(event) => { console.log(event.target.value) }} />
+          </div>
+          <button className="QuizStart" onClick={this.ShowQuiz}>Quiz Start !</button>
+        </div>
+
+      )
+    }
+  }
+}
+
+export default Quiz;

src/index.js

 import React from 'react';
 import ReactDOM from 'react-dom';
 import './index.css';
-import App from './App';
+// import App from './App';
+import Quiz from './Quiz';
 import * as serviceWorker from './serviceWorker';
 
 ReactDOM.render(
   <React.StrictMode>
-    <App />
+    <Quiz />
   </React.StrictMode>,
   document.getElementById('root')
 );