random_numbers.sgml

GLib是GTK+和GNOME工程的基础底层核心程序库

<row><entry align="right"><parameter>rand</parameter>&nbsp;:</entry>
<entry> a <link linkend="GRand">GRand</link>.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-rand-int-range">g_rand_int_range ()</title>
<programlisting><link linkend="gint32">gint32</link>      g_rand_int_range                (<link linkend="GRand">GRand</link> *rand,
                                             <link linkend="gint32">gint32</link> begin,
                                             <link linkend="gint32">gint32</link> end);</programlisting>
<para>
Returns the next random <link linkend="gint32">gint32</link> from <parameter>rand</parameter> equally distributed over
the range [<parameter>begin</parameter>..<parameter>end</parameter>-1].</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><parameter>rand</parameter>&nbsp;:</entry>
<entry> a <link linkend="GRand">GRand</link>.
</entry></row>
<row><entry align="right"><parameter>begin</parameter>&nbsp;:</entry>
<entry> lower closed bound of the interval.
</entry></row>
<row><entry align="right"><parameter>end</parameter>&nbsp;:</entry>
<entry> upper open bound of the interval.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-rand-double">g_rand_double ()</title>
<programlisting><link linkend="gdouble">gdouble</link>     g_rand_double                   (<link linkend="GRand">GRand</link> *rand);</programlisting>
<para>
Returns the next random <link linkend="gdouble">gdouble</link> from <parameter>rand</parameter> equally distributed over
the range [0..1).</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><parameter>rand</parameter>&nbsp;:</entry>
<entry> a <link linkend="GRand">GRand</link>.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-rand-double-range">g_rand_double_range ()</title>
<programlisting><link linkend="gdouble">gdouble</link>     g_rand_double_range             (<link linkend="GRand">GRand</link> *rand,
                                             <link linkend="gdouble">gdouble</link> begin,
                                             <link linkend="gdouble">gdouble</link> end);</programlisting>
<para>
Returns the next random <link linkend="gdouble">gdouble</link> from <parameter>rand</parameter> equally distributed over
the range [<parameter>begin</parameter>..<parameter>end</parameter>).</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><parameter>rand</parameter>&nbsp;:</entry>
<entry> a <link linkend="GRand">GRand</link>.
</entry></row>
<row><entry align="right"><parameter>begin</parameter>&nbsp;:</entry>
<entry> lower closed bound of the interval.
</entry></row>
<row><entry align="right"><parameter>end</parameter>&nbsp;:</entry>
<entry> upper open bound of the interval.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-random-set-seed">g_random_set_seed ()</title>
<programlisting>void        g_random_set_seed               (<link linkend="guint32">guint32</link> seed);</programlisting>
<para>
Sets the seed for the global random number generator, which is used
by the <function>g_random_*</function> functions, to <parameter>seed</parameter>.</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><parameter>seed</parameter>&nbsp;:</entry>
<entry> a value to reinitialize the global random number generator.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-random-boolean">g_random_boolean()</title>
<programlisting>#define     g_random_boolean()</programlisting>
<para>
Returns a random <link linkend="gboolean">gboolean</link>. This corresponds to a unbiased coin toss.
</para><informaltable pgwide="1" frame="none" role="params">
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<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry>a random <link linkend="gboolean">gboolean</link>.


</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-random-int">g_random_int ()</title>
<programlisting><link linkend="guint32">guint32</link>     g_random_int                    (void);</programlisting>
<para>
Return a random <link linkend="guint32">guint32</link> equally distributed over the range
[0..2^32-1].</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-random-int-range">g_random_int_range ()</title>
<programlisting><link linkend="gint32">gint32</link>      g_random_int_range              (<link linkend="gint32">gint32</link> begin,
                                             <link linkend="gint32">gint32</link> end);</programlisting>
<para>
Returns a random <link linkend="gint32">gint32</link> equally distributed over the range
[<parameter>begin</parameter>..<parameter>end</parameter>-1].</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><parameter>begin</parameter>&nbsp;:</entry>
<entry> lower closed bound of the interval.
</entry></row>
<row><entry align="right"><parameter>end</parameter>&nbsp;:</entry>
<entry> upper open bound of the interval.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-random-double">g_random_double ()</title>
<programlisting><link linkend="gdouble">gdouble</link>     g_random_double                 (void);</programlisting>
<para>
Returns a random <link linkend="gdouble">gdouble</link> equally distributed over the range [0..1).</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>
<refsect2>
<title><anchor id="g-random-double-range">g_random_double_range ()</title>
<programlisting><link linkend="gdouble">gdouble</link>     g_random_double_range           (<link linkend="gdouble">gdouble</link> begin,
                                             <link linkend="gdouble">gdouble</link> end);</programlisting>
<para>
Returns a random <link linkend="gdouble">gdouble</link> equally distributed over the range [<parameter>begin</parameter>..<parameter>end</parameter>).</para>
<informaltable pgwide="1" frame="none" role="params">
<tgroup cols="2">
<colspec colwidth="2*">
<colspec colwidth="8*">
<tbody>
<row><entry align="right"><parameter>begin</parameter>&nbsp;:</entry>
<entry> lower closed bound of the interval.
</entry></row>
<row><entry align="right"><parameter>end</parameter>&nbsp;:</entry>
<entry> upper open bound of the interval.
</entry></row>
<row><entry align="right"><emphasis>Returns</emphasis> :</entry><entry> A random number.
</entry></row>
</tbody></tgroup></informaltable></refsect2>

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