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ZealOS/docs/Demo/RandDemo.CC

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<pre style="font-family:monospace;font-size:12pt">
<a name="l1"></a><span class=cF1>U0</span><span class=cF0> RandPts()
<a name="l2"></a>{
<a name="l3"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l4"></a> </span><span class=cF1>F64</span><span class=cF0> t0 = </span><span class=cF5>tS</span><span class=cF0>;
<a name="l5"></a>
<a name="l6"></a> </span><span class=cF1>do</span><span class=cF0>
<a name="l7"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l8"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>1024</span><span class=cF0>; i++)
<a name="l9"></a> {
<a name="l10"></a> </span><span class=cFB>gr</span><span class=cF0>.dc-&gt;color = </span><span class=cF5>RandU16</span><span class=cF0> &amp; </span><span class=cFE>15</span><span class=cF0>;
<a name="l11"></a> </span><span class=cF5>GrPlot</span><span class=cF0>(</span><span class=cFB>gr</span><span class=cF0>.dc, </span><span class=cF5>RandU32</span><span class=cF0> % </span><span class=cF3>GR_WIDTH</span><span class=cF0>, </span><span class=cF5>RandU32</span><span class=cF0> % </span><span class=cF3>GR_HEIGHT</span><span class=cF0>);
<a name="l12"></a> }
<a name="l13"></a> </span><span class=cF5>Yield</span><span class=cF0>;
<a name="l14"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l15"></a> </span><span class=cF1>while</span><span class=cF0> (</span><span class=cF5>tS</span><span class=cF0> - t0 &lt; </span><span class=cFE>1</span><span class=cF0>);
<a name="l16"></a>
<a name="l17"></a> </span><span class=cF5>DCFill</span><span class=cF0>;
<a name="l18"></a>}
<a name="l19"></a>
<a name="l20"></a></span><span class=cF1>U0</span><span class=cF0> RandDemo()
<a name="l21"></a>{
<a name="l22"></a> </span><span class=cF9>I64</span><span class=cF0> i;
<a name="l23"></a>
<a name="l24"></a> </span><span class=cF6>&quot;Seed(0) will do timer XORed random numbers. &quot;</span><span class=cF0>
<a name="l25"></a> </span><span class=cF6>&quot;A task starts with </span><a href="https://tomawezome.github.io/ZealOS/Kernel/KTask.html#l259"><span class=cF4>Seed(0)</span></a><span class=cF6> by default.\n&quot;</span><span class=cF0>;
<a name="l26"></a> </span><span class=cF5>PressAKey</span><span class=cF0>;
<a name="l27"></a> </span><span class=cF5>Seed</span><span class=cF0>;
<a name="l28"></a> RandPts;
<a name="l29"></a> </span><span class=cF5>DCFill</span><span class=cF0>;
<a name="l30"></a>
<a name="l31"></a> </span><span class=cF6>&quot;\nSeed(num) will do deterministic, non-timer random numbers starting at &quot;</span><span class=cF0>
<a name="l32"></a> </span><span class=cF6>&quot;a specific seed. You can run a specific video game over and over &quot;</span><span class=cF0>
<a name="l33"></a> </span><span class=cF6>&quot;by typing Seed(num) at the cmd line before the game.\n&quot;</span><span class=cF0>;
<a name="l34"></a> </span><span class=cF5>PressAKey</span><span class=cF0>;
<a name="l35"></a> </span><span class=cF5>Seed</span><span class=cF0>(</span><span class=cFE>1</span><span class=cF0>);
<a name="l36"></a> RandPts;
<a name="l37"></a> </span><span class=cF5>DCFill</span><span class=cF0>;
<a name="l38"></a>
<a name="l39"></a> </span><span class=cF6>&quot;\n\n\nWatch when we specify specific seeds:&quot;</span><span class=cF0>;
<a name="l40"></a>
<a name="l41"></a> </span><span class=cF6>&quot;\n\nSeed(1);\n&quot;</span><span class=cF0>;
<a name="l42"></a> </span><span class=cF5>Seed</span><span class=cF0>(</span><span class=cFE>1</span><span class=cF0>);
<a name="l43"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>5</span><span class=cF0>; i++)
<a name="l44"></a> </span><span class=cF6>&quot;%d: %d\n&quot;</span><span class=cF0>, i, </span><span class=cF5>RandI16</span><span class=cF0>;
<a name="l45"></a>
<a name="l46"></a> </span><span class=cF6>&quot;\nSeed(2); Different, right?\n&quot;</span><span class=cF0>;
<a name="l47"></a> </span><span class=cF5>Seed</span><span class=cF0>(</span><span class=cFE>2</span><span class=cF0>);
<a name="l48"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>5</span><span class=cF0>; i++)
<a name="l49"></a> </span><span class=cF6>&quot;%d: %d\n&quot;</span><span class=cF0>, i, </span><span class=cF5>RandI16</span><span class=cF0>;
<a name="l50"></a>
<a name="l51"></a> </span><span class=cF6>&quot;\nSeed(1); Repeats earlier values.\n&quot;</span><span class=cF0>;
<a name="l52"></a> </span><span class=cF5>Seed</span><span class=cF0>(</span><span class=cFE>1</span><span class=cF0>);
<a name="l53"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>5</span><span class=cF0>; i++)
<a name="l54"></a> </span><span class=cF6>&quot;%d: %d\n&quot;</span><span class=cF0>, i, </span><span class=cF5>RandI16</span><span class=cF0>;
<a name="l55"></a>
<a name="l56"></a> </span><span class=cF6>&quot;\nSeed(0); Zero is special.\n&quot;</span><span class=cF0>;
<a name="l57"></a> </span><span class=cF5>Seed</span><span class=cF0>(</span><span class=cFE>0</span><span class=cF0>);
<a name="l58"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>5</span><span class=cF0>; i++)
<a name="l59"></a> </span><span class=cF6>&quot;%d: %d\n&quot;</span><span class=cF0>, i, </span><span class=cF5>RandI16</span><span class=cF0>;
<a name="l60"></a>
<a name="l61"></a> </span><span class=cF6>&quot;\nSeed(0); Non-repeating.\n&quot;</span><span class=cF0>;
<a name="l62"></a> </span><span class=cF5>Seed</span><span class=cF0>(</span><span class=cFE>0</span><span class=cF0>);
<a name="l63"></a> </span><span class=cF1>for</span><span class=cF0> (i = </span><span class=cFE>0</span><span class=cF0>; i &lt; </span><span class=cFE>5</span><span class=cF0>; i++)
<a name="l64"></a> </span><span class=cF6>&quot;%d: %d\n&quot;</span><span class=cF0>, i, </span><span class=cF5>RandI16</span><span class=cF0>;
<a name="l65"></a>
<a name="l66"></a> </span><span class=cF5>Seed</span><span class=cF0>; </span><span class=cF2>//Default should be kept to zero.</span><span class=cF0>
<a name="l67"></a>}
<a name="l68"></a>
<a name="l69"></a>RandDemo;
</span></pre></body>
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