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<p>1) <a href="http://itsys.hansung.ac.kr/cgi-bin/kplus/board/include/DOWNLOAD.php3?table=lec_dstruct_test&l=5-000514&inc=local&f=filelink" style="text-decoration: none; color: black; font-family: 돋움; font-size: 12px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: -webkit-right; text-indent: 0px; text-transform: none; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; white-space: normal; background-color: rgb(255, 255, 255);" target="_blank" title="다운로드 38회">malloc 2차원 배열 할당.txt</a>: 두 차원의 배열을 모두 malloc 으로 할당하는 방법</p><p>2) malloc 2차원 배열 할달2.txt: 1차원은 배열로 2차원은 malloc 으로 할당하는 방법</p><p><br />[분석]</p><p>- 기본적으로 동적 메모리할당은 메모리가 많이 필요한 경우 사용하는 방법으로<br /> // <span style="color:#ff0000;">1차원, 2차원 배열이 모두 큰 경우 1)번 방법이 좋음</span></p><p> // <span style="background-color:#ffff00;">두 차원 중 적은 차원이 있는 경우 2)번 방법처럼 해당 차원은 배열로 해도 좋음</span></p><p> </p><div class="colorscripter-code" style="color:#010101;font-family:Consolas, 'Liberation Mono', Menlo, Courier, monospace !important; position:relative !important;overflow:auto"><table cellpadding="0" cellspacing="0" class="colorscripter-code-table" style="margin:0;padding:0;border:none;background-color:#fafafa;border-radius:4px;"> <tbody> <tr> <td style="padding:6px;border-right:2px solid #e5e5e5"> <div style="margin:0;padding:0;word-break:normal;text-align:right;color:#666;font-family:Consolas, 'Liberation Mono', Menlo, Courier, monospace !important;line-height:130%"> <div style="line-height:130%">1</div> <div style="line-height:130%">2</div> <div style="line-height:130%">3</div> <div style="line-height:130%">4</div> <div style="line-height:130%">5</div> <div style="line-height:130%">6</div> <div style="line-height:130%">7</div> <div style="line-height:130%">8</div> <div style="line-height:130%">9</div> <div style="line-height:130%">10</div> <div style="line-height:130%">11</div> <div style="line-height:130%">12</div> <div style="line-height:130%">13</div> <div style="line-height:130%">14</div> <div style="line-height:130%">15</div> <div style="line-height:130%">16</div> <div style="line-height:130%">17</div> <div style="line-height:130%">18</div> <div style="line-height:130%">19</div> <div style="line-height:130%">20</div> <div style="line-height:130%">21</div> <div style="line-height:130%">22</div> <div style="line-height:130%">23</div> <div style="line-height:130%">24</div> <div style="line-height:130%">25</div> <div style="line-height:130%">26</div> <div style="line-height:130%">27</div> <div style="line-height:130%">28</div> <div style="line-height:130%">29</div> <div style="line-height:130%">30</div> <div style="line-height:130%">31</div> <div style="line-height:130%">32</div> <div style="line-height:130%">33</div> <div style="line-height:130%">34</div> <div style="line-height:130%">35</div> <div style="line-height:130%">36</div> <div style="line-height:130%">37</div> <div style="line-height:130%">38</div> <div style="line-height:130%">39</div> <div style="line-height:130%">40</div> <div style="line-height:130%">41</div> </div> </td> <td style="padding:6px 0;text-align:left"> <div style="margin:0;padding:0;color:#010101;font-family:Consolas, 'Liberation Mono', Menlo, Courier, monospace !important;line-height:130%"> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#define</span> _CRT_SECURE_NO_WARNINGS</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#include</span> <span style="color:#a71d5d"><</span>stdio.h<span style="color:#a71d5d">></span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#include</span> <span style="color:#a71d5d"><</span><span style="color:#066de2">malloc</span>.h<span style="color:#a71d5d">></span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#include</span> <span style="color:#a71d5d"><</span>stdlib.h<span style="color:#a71d5d">></span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#define</span> N_STUDENTS <span style="color:#0099cc">4</span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#066de2">char</span><span style="color:#a71d5d">*</span><span style="color:#a71d5d">*</span> name; <span style="color:#999999">// 아래 코드에서 malloc으로 char name[4][10] 처럼 할당됨</span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#066de2">int</span> main(<span style="color:#a71d5d">void</span>)</div> <div style="padding:0 6px; white-space:pre; line-height:130%">{</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">int</span> i;</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"> name <span style="color:#a71d5d">=</span> (<span style="color:#066de2">char</span> <span style="color:#a71d5d">*</span><span style="color:#a71d5d">*</span>)<span style="color:#066de2">malloc</span>(<span style="color:#a71d5d">sizeof</span>(<span style="color:#066de2">char</span> <span style="color:#a71d5d">*</span>) <span style="color:#a71d5d">*</span> N_STUDENTS);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">if</span> (name <span style="color:#a71d5d">=</span><span style="color:#a71d5d">=</span> <span style="color:#0086b3">NULL</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> fprintf(stderr, <span style="color:#63a35c">"Malloc fail !!!\n"</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> exit(<span style="color:#a71d5d">-</span><span style="color:#0099cc">1</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">if</span> (name <span style="color:#a71d5d">!</span><span style="color:#a71d5d">=</span> <span style="color:#0086b3">NULL</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> name[i] <span style="color:#a71d5d">=</span> (<span style="color:#066de2">char</span><span style="color:#a71d5d">*</span>)<span style="color:#066de2">malloc</span>(<span style="color:#a71d5d">sizeof</span>(<span style="color:#066de2">char</span>) <span style="color:#a71d5d">*</span> <span style="color:#0099cc">10</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">if</span> (name[i] <span style="color:#a71d5d">=</span><span style="color:#a71d5d">=</span> <span style="color:#0086b3">NULL</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> fprintf(stderr, <span style="color:#63a35c">"Malloc fail !!!\n"</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> exit(<span style="color:#a71d5d">-</span><span style="color:#0099cc">1</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">printf</span>(<span style="color:#63a35c">"%d 번째 이름: "</span>,i<span style="color:#a71d5d">+</span><span style="color:#0099cc">1</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">scanf</span>(<span style="color:#63a35c">"%s"</span>, name[i]);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">printf</span>(<span style="color:#63a35c">"(%d) 이름: %s \n"</span>, i<span style="color:#a71d5d">+</span><span style="color:#0099cc">1</span>, name[i]);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) <span style="color:#999999">// malloc 할당 해제 중요</span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">free</span>(name[i]);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">free</span>(name); <span style="color:#999999">// malloc 할당 해제 중요</span></div> <div style="padding:0 6px; white-space:pre; line-height:130%">}</div> </div> <div style="text-align:right;margin-top:-13px;margin-right:5px;font-size:9px;font-style:italic"><a href="http://colorscripter.com/info#e" style="color:#e5e5e5text-decoration:none" target="_blank">Colored by Color Scripter</a></div> </td> <td style="vertical-align:bottom;padding:0 2px 4px 0"><a href="http://colorscripter.com/info#e" style="text-decoration:none;color:white" target="_blank"><span style="font-size:9px;word-break:normal;background-color:#e5e5e5;color:white;border-radius:10px;padding:1px">cs</span></a></td> </tr> </tbody></table></div><p> </p><div class="colorscripter-code" style="color:#010101;font-family:Consolas, 'Liberation Mono', Menlo, Courier, monospace !important; position:relative !important;overflow:auto"><table cellpadding="0" cellspacing="0" class="colorscripter-code-table" style="margin:0;padding:0;border:none;background-color:#fafafa;border-radius:4px;"> <tbody> <tr> <td style="padding:6px;border-right:2px solid #e5e5e5"> <div style="margin:0;padding:0;word-break:normal;text-align:right;color:#666;font-family:Consolas, 'Liberation Mono', Menlo, Courier, monospace !important;line-height:130%"> <div style="line-height:130%">1</div> <div style="line-height:130%">2</div> <div style="line-height:130%">3</div> <div style="line-height:130%">4</div> <div style="line-height:130%">5</div> <div style="line-height:130%">6</div> <div style="line-height:130%">7</div> <div style="line-height:130%">8</div> <div style="line-height:130%">9</div> <div style="line-height:130%">10</div> <div style="line-height:130%">11</div> <div style="line-height:130%">12</div> <div style="line-height:130%">13</div> <div style="line-height:130%">14</div> <div style="line-height:130%">15</div> <div style="line-height:130%">16</div> <div style="line-height:130%">17</div> <div style="line-height:130%">18</div> <div style="line-height:130%">19</div> <div style="line-height:130%">20</div> <div style="line-height:130%">21</div> <div style="line-height:130%">22</div> <div style="line-height:130%">23</div> <div style="line-height:130%">24</div> <div style="line-height:130%">25</div> <div style="line-height:130%">26</div> <div style="line-height:130%">27</div> <div style="line-height:130%">28</div> <div style="line-height:130%">29</div> <div style="line-height:130%">30</div> <div style="line-height:130%">31</div> <div style="line-height:130%">32</div> <div style="line-height:130%">33</div> </div> </td> <td style="padding:6px 0;text-align:left"> <div style="margin:0;padding:0;color:#010101;font-family:Consolas, 'Liberation Mono', Menlo, Courier, monospace !important;line-height:130%"> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#define</span> _CRT_SECURE_NO_WARNINGS</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#include</span> <span style="color:#a71d5d"><</span>stdio.h<span style="color:#a71d5d">></span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#include</span> <span style="color:#a71d5d"><</span><span style="color:#066de2">malloc</span>.h<span style="color:#a71d5d">></span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#include</span> <span style="color:#a71d5d"><</span>stdlib.h<span style="color:#a71d5d">></span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#0086b3">#define</span> N_STUDENTS <span style="color:#0099cc">4</span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#066de2">char</span><span style="color:#a71d5d">*</span> name[N_STUDENTS]; <span style="color:#999999">// 아래 코드에서 malloc으로 char name[4][10] 처럼 할당됨</span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"><span style="color:#066de2">int</span> main(<span style="color:#a71d5d">void</span>)</div> <div style="padding:0 6px; white-space:pre; line-height:130%">{</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">int</span> i;</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> name[i] <span style="color:#a71d5d">=</span> (<span style="color:#066de2">char</span><span style="color:#a71d5d">*</span>)<span style="color:#066de2">malloc</span>(<span style="color:#a71d5d">sizeof</span>(<span style="color:#066de2">char</span>) <span style="color:#a71d5d">*</span> <span style="color:#0099cc">10</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">if</span> (name[i] <span style="color:#a71d5d">=</span><span style="color:#a71d5d">=</span> <span style="color:#0086b3">NULL</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> fprintf(stderr, <span style="color:#63a35c">"Malloc fail !!!\n"</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> exit(<span style="color:#a71d5d">-</span><span style="color:#0099cc">1</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">printf</span>(<span style="color:#63a35c">"%d 번째 이름: "</span>, i <span style="color:#a71d5d">+</span> <span style="color:#0099cc">1</span>);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">scanf</span>(<span style="color:#63a35c">"%s"</span>, name[i]);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) {</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">printf</span>(<span style="color:#63a35c">"(%d) 이름: %s \n"</span>, i <span style="color:#a71d5d">+</span> <span style="color:#0099cc">1</span>, name[i]);</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> }</div> <div style="padding:0 6px; white-space:pre; line-height:130%"> </div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#a71d5d">for</span> (i <span style="color:#a71d5d">=</span> <span style="color:#0099cc">0</span>; i <span style="color:#a71d5d"><</span> N_STUDENTS; i<span style="color:#a71d5d">+</span><span style="color:#a71d5d">+</span>) <span style="color:#999999">// malloc 할당 해제 중요</span></div> <div style="padding:0 6px; white-space:pre; line-height:130%"> <span style="color:#066de2">free</span>(name[i]);</div> <div style="padding:0 6px; white-space:pre; line-height:130%">}</div> </div> <div style="text-align:right;margin-top:-13px;margin-right:5px;font-size:9px;font-style:italic"><a href="http://colorscripter.com/info#e" style="color:#e5e5e5text-decoration:none" target="_blank">Colored by Color Scripter</a></div> </td> <td style="vertical-align:bottom;padding:0 2px 4px 0"><a href="http://colorscripter.com/info#e" style="text-decoration:none;color:white" target="_blank"><span style="font-size:9px;word-break:normal;background-color:#e5e5e5;color:white;border-radius:10px;padding:1px">cs</span></a></td> </tr> </tbody></table></div><p> </p>
+
파일첨부1
기존파일유지 (
malloc 2차원 배열 할당.txt
)
+
파일첨부2
기존파일유지 (
malloc 2차원 배열할당 2.txt
)
+
패스워드
+ 패스워드를 입력해 주셔야 글 수정 및 삭제가 가능합니다.
+ 업로드는
10MB
까지 가능합니다.
+ 업로드는 링크도 가능합니다.(링크방법 : http://www.kimsmall21.com/xxx.gif)
+ 파일첨부시 두개의 파일을 모두 업로드할 경우, 첨부파일1만 자동실행됩니다.
+ 욕설 및 기타 성격에 맞지 않는 글은 삼가 주세요.