使用 javascirpt 写的，因此可以使用浏览器浏览即可
code:
<meta charset="utf-8">输入划分网段的数量： <input id="inp_netCount" /> <input type="button" οnclick="createElem()" value="start"><hr> <div id="div_showNet" style="border:1px solid #c3c3c3;width:500px;height:300px;overflow:scroll"> </div><br/><br>输入被划分的IP地址： <input id="inp_startIP" /> <input type="button" οnclick="beginInit()" value="start"><hr> <div id=""><table class="table_showResult" id="table_showResult" border=1><tr><td>网络地址</td><td>子网掩码</td><td>第一地址</td><td>最后地址</td><td>广播地址</td></tr></table> </div><script>/************************** GOLBAL **************************/var __pointer = 0;var netcount = 0;var hostbit = new Array();var beginIP = new Array();var netmask = new Array();/************************** CREATE INP **************************/function createElem(){var str = "";netcount = document.getElementById("inp_netCount").value;for(var i=1; i<=netcount; i++){str += "第" + (i<10?i="0"+i:i) + "网段需要";str += "<input id=a"+(i-0)+" size='10' value='"+i*100+"'/>台 ";if(i%2==0)str+="<br/>"}document.getElementById("div_showNet").innerHTML = str}/************************** INIT MAIN **************************/function beginInit(){calcHostBit();calcBeginIP();calcNetMask();//alert(hostbit.join("\n"));//alert(beginIP.join("\n"));//alert(netmask.join("\n"));for(var i=0; i<netcount; i++)calcTheMain(i);}function calcHostBit(){var b = 0;var hostcount;//clearHostbitfor(i=0; i<netcount; i++)hostbit[i] = 0;//setHostbitfor(i=0; i<netcount; i++){hostcount = document.getElementById("a"+(i+1)).value - 0 + 2;while( (1<<b) < hostcount )b++;hostbit[i] = b;b=0;}//sortHostbitfor(i=0; i<netcount; i++)hostbit[i]-=0;//for(i=0; i<netcount; i++)// alert(hostbit[i]) hostbit.sort(function s(a,b){return b-a});}function calcBeginIP(){__pointer = 0;var increment = 0;var carry_num = 0;var startIP_String = "";var startIP_Array = new Array();beginIP[0] = document.getElementById("inp_startIP").value;for(var i=1; i<=netcount; i++){startIP_Array = beginIP[i-1].split(".");for(var x in startIP_Array)startIP_Array[x]-=0;increment = 1<<hostbit[__pointer];startIP_Array[3] += increment;for(var j=3; j>0; j--){carry_num = Math.floor(startIP_Array[j] / 256);startIP_Array[j] %= 256;startIP_Array[j-1] += carry_num;}__pointer++;beginIP[i] = startIP_Array.join(".");}}function calcNetMask(){var str="";for(var i=0; i<netcount; i++){var n = hostbit[i]-0;if( n==32 )str = "0.0.0.0";else if( n>24 )str = changeToNum(n-24) + ".0.0.0";else if( n>16 )str = "255." + changeToNum(n-16) + ".0.0";else if( n>8 )str = "255.255." + changeToNum(n-8) + ".0"else str = "255.255.255." + changeToNum(n)netmask[i] = str}}function calcTheMain(i){var calcresult = "";var network_string = beginIP[i] //获取网络号var netmask_string = netmask[i] //获取子网号var broadcast_string = beginIP[i+1] //获取下个网络号var network_array = network_string.split(".")var netmask_array = netmask_string.split(".")var broadcast_array = broadcast_string.split(".") for(var j=3; j>0; j--){ //计算广播地址if(--broadcast_array[j] < 0) //如果不够减先前借一位broadcast_array[j]=255;elsebreak; //如果够减了，退出循环 }if( broadcast_array[3]%2 == 0){ //如果最后一位是偶数 alert("计算错误，广播地址意外为偶数!");return ;}var broadcast_string = broadcast_array.join(".")network_array[3]-=0; //计算首个地址network_array[3]+=1;var firstaddr_string = network_array.join(".")broadcast_array[3]-=0; //计算最后地址broadcast_array[3]-=1;var lastaddr_string = broadcast_array.join(".")calcresult += "<tr>";calcresult += "<td>"+ network_string +"</td>";calcresult += "<td>"+ netmask_string +"</td>";calcresult += "<td>"+ firstaddr_string +"</td>";calcresult += "<td>"+ lastaddr_string +"</td>";calcresult += "<td>"+ broadcast_string +"</td>"; calcresult += "</tr>";document.getElementById("table_showResult").innerHTML += calcresult;}function changeToNum(n){if(n==0)return 255;if(n==1)return 254;if(n==2)return 252;if(n==3)return 248;if(n==4)return 240;if(n==5)return 224;if(n==6)return 192;if(n==7)return 128;if(n==8)return 0; }//for(var i=0; i<4; i++) //计算广播地址// broadcast_array[i] = network_array[i] & (~netmask_array[i]+256)//var broadcast_string = broadcast_array.join(".")</script>
