一共有多少个三角形

来源：互联网发布：哈尔滨雾霾数据编辑：程序博客网时间：2024/04/27 19:50

<html><body><script>var dotArr=new Array();var inLineArr=new Array();var dot = new Array([2,3,4,5,6,7,8,9,10,11],[1,3,4,5,6],[1,2,4,5,7,10],[1,2,3,5,8,11],[1,2,3,4,6,9,10,11],[1,2,5,7,8,9,10,11],[1,3,6,8,9,10],[1,4,6,7,9,11],[1,5,6,7,8],[1,3,5,6,7,11],[1,4,5,6,8,10]);var inLineArray= new Array([1,2,6],[1,3,7,10],[1,4,8,11],[1,5,9],[2,3,4,5],[6,7,8,9],[5,6,10,11]);for(i=0;i<dot.length;i++){for (j =0; j<dot[i].length;j++){  if((i+1)<dot[i][j]){for (k =0; k<dot[dot[i][j]-1].length;k++){if(dot[i][j]<dot[dot[i][j]-1][k]&&(dot[i].indexOf(dot[dot[i][j]-1][k])!=-1)){dotArr.push((i+1)+","+dot[i][j]+","+dot[dot[i][j]-1][k]);}}  }}}for(var l=0;l<inLineArray.length;l++){var i=0if(inLineArray[l].length-i>2){for (;i<inLineArray[l].length;i++){var j=i+1if(inLineArray[l].length-j>1){for (;j<(inLineArray[l].length);j++){var k=j+1if(inLineArray[l].length-k>0){for (;k<inLineArray[l].length;k++){inLineArr.push(inLineArray[l][i]+","+inLineArray[l][j]+","+inLineArray[l][k])}}}}}}}var k=0;for(var i=0;i<dotArr.length;i++){var hasEle= false;foronce:{for(var j=0;j<inLineArr.length;j++){if(dotArr[i]==inLineArr[j]){hasEle = true;break foronce;}}if(!hasEle) document.write(dotArr[i]+"<br>");k=k+1;}}document.write("一共 "+k+"个三角形<br>")</script></body></html>

输出：

1,2,3
1,2,4
1,2,5
1,3,4
1,3,5
1,4,5
1,5,6
1,5,10
1,5,11
1,6,7
1,6,8
1,6,9
1,6,10
1,6,11
1,7,8
1,7,9
1,8,9
1,10,11
2,5,6
3,5,10
4,5,11
5,6,9
6,7,10
6,8,11
一共 24个三角形

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