80 lines
5.4 KiB
Plaintext
80 lines
5.4 KiB
Plaintext
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="generator" content="TempleOS V5.03">
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<meta name="viewport" content="width=device-width">
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<link rel="stylesheet" href="/style/templeos.css">
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<script src="/script/templeos.js"></script>
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<style type="text/css">
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.cF0{color:#000000;background-color:#ffffff;}
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.cF1{color:#0000aa;background-color:#ffffff;}
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.cF2{color:#00aa00;background-color:#ffffff;}
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.cF3{color:#00aaaa;background-color:#ffffff;}
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.cF4{color:#aa0000;background-color:#ffffff;}
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.cF5{color:#aa00aa;background-color:#ffffff;}
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.cF6{color:#aa5500;background-color:#ffffff;}
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.cF7{color:#aaaaaa;background-color:#ffffff;}
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.cF8{color:#555555;background-color:#ffffff;}
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.cF9{color:#5555ff;background-color:#ffffff;}
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.cFA{color:#55ff55;background-color:#ffffff;}
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.cFB{color:#55ffff;background-color:#ffffff;}
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.cFC{color:#ff5555;background-color:#ffffff;}
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.cFD{color:#ff55ff;background-color:#ffffff;}
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.cFE{color:#ffff55;background-color:#ffffff;}
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.cFF{color:#ffffff;background-color:#ffffff;}
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</style>
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</head>
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<body>
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<pre id="content">
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<a name="l1"></a><span class=cF2>//x must be global.</span><span class=cF0>
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<a name="l2"></a></span><span class=cF2>//Might as well make y global.</span><span class=cF0>
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<a name="l3"></a>
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<a name="l4"></a></span><span class=cF1>F64</span><span class=cF0> x,y,y_last;
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<a name="l5"></a>
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<a name="l6"></a></span><span class=cF1>U0</span><span class=cF0> Cartesian()
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<a name="l7"></a>{
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<a name="l8"></a> </span><span class=cF1>U8</span><span class=cF0> *st;
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<a name="l9"></a> </span><span class=cF9>I64</span><span class=cF0> ch=0,h,v;
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<a name="l10"></a> </span><span class=cF1>Bool</span><span class=cF0> first;
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<a name="l11"></a> </span><span class=cF9>CDC</span><span class=cF0> *dc=</span><span class=cF5>DCAlias</span><span class=cF0>;
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<a name="l12"></a> </span><span class=cF1>do</span><span class=cF0> </span><span class=cF7>{</span><span class=cF0>
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<a name="l13"></a> </span><span class=cF5>DocClear</span><span class=cF0>;
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<a name="l14"></a> </span><span class=cF6>"Enter algebraic equation to graph.\n"</span><span class=cF0>
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<a name="l15"></a> </span><span class=cF6>"Example: y=2*x\n"</span><span class=cF0>
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<a name="l16"></a> </span><span class=cF6>"y="</span><span class=cF0>;
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<a name="l17"></a> </span><span class=cF1>if</span><span class=cF0> (st=</span><span class=cF5>GetStr</span><span class=cF0>) {
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<a name="l18"></a> </span><span class=cF1>if</span><span class=cF0> (*st) </span><span class=cF7>{</span><span class=cF0>
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<a name="l19"></a> h=</span><span class=cF5>Fs</span><span class=cF0>->pix_width/2;
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<a name="l20"></a> v=</span><span class=cF5>Fs</span><span class=cF0>->pix_height/2;
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<a name="l21"></a> dc->color=</span><span class=cF3>RED</span><span class=cF0>;
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<a name="l22"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc,h,0,h,2*v+1);
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<a name="l23"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc,0,v,2*h+1,v);
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<a name="l24"></a> first=</span><span class=cF3>TRUE</span><span class=cF0>;
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<a name="l25"></a> dc->color=</span><span class=cF3>BLACK</span><span class=cF0>;
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<a name="l26"></a> </span><span class=cF1>for</span><span class=cF0> (x=-h;x<=h;x++) {
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<a name="l27"></a> y=-</span><span class=cF5>ExePrint</span><span class=cF0>(</span><span class=cF6>"ToF64(%s);"</span><span class=cF0>,st)(</span><span class=cF1>F64</span><span class=cF0>);
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<a name="l28"></a> </span><span class=cF1>if</span><span class=cF0> (!first)
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<a name="l29"></a> </span><span class=cF5>GrLine</span><span class=cF0>(dc,x-1+h,y_last+v,x+h,y+v);
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<a name="l30"></a> y_last=y;
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<a name="l31"></a> first=</span><span class=cF3>FALSE</span><span class=cF0>;
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<a name="l32"></a> }
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<a name="l33"></a> ch=</span><span class=cF5>GetChar</span><span class=cF0>;
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<a name="l34"></a> </span><span class=cF7>}</span><span class=cF0> </span><span class=cF1>else</span><span class=cF0>
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<a name="l35"></a> ch=</span><span class=cF3>CH_SHIFT_ESC</span><span class=cF0>;
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<a name="l36"></a> </span><span class=cF5>Free</span><span class=cF0>(st);
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<a name="l37"></a> } </span><span class=cF1>else</span><span class=cF0>
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<a name="l38"></a> ch=</span><span class=cF3>CH_SHIFT_ESC</span><span class=cF0>;
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<a name="l39"></a> </span><span class=cF5>DCFill</span><span class=cF0>;
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<a name="l40"></a> </span><span class=cF7>}</span><span class=cF0> </span><span class=cF1>while</span><span class=cF0> (ch!=</span><span class=cF3>CH_SHIFT_ESC</span><span class=cF0> && ch!=</span><span class=cF3>CH_ESC</span><span class=cF0>);
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<a name="l41"></a> </span><span class=cF5>DCDel</span><span class=cF0>(dc);
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<a name="l42"></a>}
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<a name="l43"></a>
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<a name="l44"></a>Cartesian;
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<a name="l45"></a>
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<a name="l46"></a></span><span class=cF2>//For better performance, compile the expression entered by the</span><span class=cF0>
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<a name="l47"></a></span><span class=cF2>//user one time with </span><a href="/Wb/Compiler/PrsExp.HC.HTML#l1117"><span class=cF4>LexExpression2Bin</span></a><span class=cF2>() and use </span><a href="/Wb/Kernel/KernelB.HH.HTML#l44"><span class=cF4>Call</span></a><span class=cF2>().</span><span class=cF0>
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<a name="l48"></a></span><span class=cF2>//See </span><a href="/Wb/Demo/CompileDemo.HC.HTML#l1"><span class=cF4>::/Demo/CompileDemo.HC</span></a><span class=cF2>.</span><span class=cF0>
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</span></pre></body>
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</html>
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