<![CDATA[
<SCRIPT LANGUAGE="JavaScript">
<!--
document.write("幾何模様を描く<BR>");
num = prompt("Please Input Number ?","");
document.write("Number=",num,"<BR><BR>");
]]> 変数の宣言
<![CDATA[
sp = " ";
sl = "/";
at = "*";
document.write("<PRE>");
document.write("sp=",sp,",sl=",sl,",at=",at,"<BR>");
document.write("TEST LINE<BR>");
]]> 上半分のループ設定
<![CDATA[
for (cntl = 1; cntl <= num-1; cntl++) {
for (cntc = cntl; cntc <= num; cntc++)
document.write(at);
for (cntc = 1; cntc <= cntl*2-1; cntc++)
document.write(sp);
for (cntc = cntl; cntc <= num; cntc++)
document.write(at);
document.write("<BR>");
}
]]> 下半分のループ設定
<![CDATA[
for (cntl = 1; cntl <= num; cntl++) {
for (cntc = 1; cntc <= cntl; cntc++)
document.write(at);
for (cntc = cntl; cntc <= num*2-cntl; cntc++)
document.write(sp);
for (cntc = 1; cntc <= cntl; cntc++)
document.write(at);
document.write("<BR>");
}
document.write("</PRE>");
// -->
</SCRIPT>
]]>
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先ほどの菱形を反転して描く。
空白のあとにもう一度＊を描くプログラムを追加しただけである。
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