選択できるのは25トピックまでです。 トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。

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  53. <a name="div_002d_002d_002ddivide-two-integers"></a>
  54. <h3 class="section">2.12 <code>div</code>&mdash;divide two integers</h3>
  55. <a name="index-div"></a>
  56. <p><strong>Synopsis</strong>
  57. </p><div class="example">
  58. <pre class="example">#include &lt;stdlib.h&gt;
  59. div_t div(int <var>n</var>, int <var>d</var>);
  60. </pre></div>
  61. <p><strong>Description</strong><br>
  62. Divide
  63. <var>n</var>/<var>d</var>,
  64. returning quotient and remainder as two integers in a structure <code>div_t</code>.
  65. </p>
  66. <br>
  67. <p><strong>Returns</strong><br>
  68. The result is represented with the structure
  69. </p>
  70. <div class="smallexample">
  71. <pre class="smallexample"> typedef struct
  72. {
  73. int quot;
  74. int rem;
  75. } div_t;
  76. </pre></div>
  77. <p>where the <code>quot</code> field represents the quotient, and <code>rem</code> the
  78. remainder. For nonzero <var>d</var>, if &lsquo;<code><var>r</var> = div(<var>n</var>,<var>d</var>);</code>&rsquo; then
  79. <var>n</var> equals &lsquo;<code><var>r</var>.rem + <var>d</var>*<var>r</var>.quot</code>&rsquo;.
  80. </p>
  81. <p>To divide <code>long</code> rather than <code>int</code> values, use the similar
  82. function <code>ldiv</code>.
  83. </p>
  84. <br>
  85. <p><strong>Portability</strong><br>
  86. <code>div</code> is ANSI.
  87. </p>
  88. <p>No supporting OS subroutines are required.
  89. </p>
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