<p></p><p><br></p><p>public class Problem9 {</p><p><br></p><p><span class="Apple-tab-span" style="white-space:pre"> </span>public static void main(String[] args) {</p><p><span class="Apple-tab-span" style="white-space:pre"> </span>// TODO Auto-generated method stub</p><p><br></p><p><span class="Apple-tab-span" style="white-space:pre"> </span>double w = 4.5;</p><p><span class="Apple-tab-span" style="white-space:pre"> </span>double h = 7.9;</p><p><span class="Apple-tab-span" style="white-space:pre"> </span></p><p><span class="Apple-tab-span" style="white-space:pre"> </span>double area = w * h;</p><p><span class="Apple-tab-span" style="white-space:pre"> </span>double perimeter = 2 * (w + h);</p><p><span class="Apple-tab-span" style="white-space:pre"> </span></p><p><span class="Apple-tab-span" style="white-space:pre"> </span>System.out.println("The area of a rectangle with the width of " + w + " and height of " + h + " is " + area + ".");</p><p><span class="Apple-tab-span" style="white-space:pre"> </span>System.out.println("The perimeter of a rectangle with the width of " + w + " and height of " + h + " is " + perimeter + ".");</p><p><span class="Apple-tab-span" style="white-space:pre"> </span></p><p><span class="Apple-tab-span" style="white-space:pre"> </span>System.out.println(area);</p><p><span class="Apple-tab-span" style="white-space:pre"> </span>System.out.println(4.5 * 7.9);</p><p><span class="Apple-tab-span" style="white-space:pre"> </span></p><p><span class="Apple-tab-span" style="white-space:pre"> </span></p><p><span class="Apple-tab-span" style="white-space:pre"> </span></p><p><span class="Apple-tab-span" style="white-space:pre"> </span>}</p><p><br></p><p>}</p><div><br></div><div>이렇게 하고 런 하면</div><div><br></div><div><div><br class="Apple-interchange-newline">The area of a rectangle with the width of 4.5 and height of 7.9 is 35.550000000000004.</div><div>The perimeter of a rectangle with the width of 4.5 and height of 7.9 is 24.8.</div><div>35.550000000000004</div><div>35.550000000000004</div></div><div><br></div><div>이렇게 뜨는데 왜 </div><div><br></div><div>7.9*4.5 가 35.550000000000000004 로 나오나요 ㅠㅠ??</div><div><br></div><div>35.55 라고 나와야 되는거 아닌가요?>?</div><div><br></div><div>0.0000000000004 는 어디서 갑툭튀 하는건지 모르겟네요;;</div><div><br></div><div><br></div><div><br></div><div><br></div><p></p>
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