jave 计算24点程式.java

用JAVA开发的计算24点程式 把代码里的return删除即可列出所有答案。 请嵌入HTML中使用更佳。

<tr><td align="center">
<form method="post" action="#" id="form1">
<input style="width:35" id="t1" name="t1">
<input style="width:35" id="t2" name="t2">
<input style="width:35" id="t3" name="t3">
<input style="width:35" id="t4" name="t4"><br>
<input style="width:115" id="t5" name="t5">
<input type=reset name="t6" value="清除">
</form>
<script language=javascript>
function fun1(e1,e2,e3,e4)
{
  var i,j,k,a,b,c,d,t1,t2,t3;
  var opx=["+","-","*","/","-","/"];
  a=e1;b=e2;c=e3;d=e4;
  for(i=0;;)
  {
    if(i>=4)break;
    if(i==0)t1=a+b;   
    if(i==1)if(a-b>0)t1=a-b;   
    if(i==2)t1=a*b;   
    if(i==3)if(b!=0)t1=a/b;
    for(j=0;;)
    {
        if(j>5)break;
        if(j==0)t2=t1+c;
        if(j==1)t2=t1-c;
        if(j==2)t2=t1*c;
        if(j==3)if(c!=0)t2=t1/c;
        if(j==4)t2=c-t1;
        if(j==5)if(t1!=0)t2=c/t1;
        for(k=0;;k++)
        {
          if(k>5)break;
          if(k==0)t3=t2+d;
          if(k==1)t3=t2-d;
          if(k==2)t3=t2*d;
          if(k==3)if(d!=0)t3=t2/d;
          if(k==4)t3=d-t2;
          if(k==5)if(t2!=0)t2=d/t2;
          if(t3==24)
          {var str="";
          var t="";
            /*if(j>1||k>1)document.write ("(");
            document.write (a+opx[i]+b);
            if(j>1)document.write (")");
            document.write (opx[j]+c);
            if(j<2&&k>1)document.write (")");
            document.write (opx[k]+d);
            document.write ("=24<br>");*/

            if((j>1||k>1)&&i<2)t="(";
            if((j<2||j==4)&&k>1&&i>1)t="(";
            str=str+a+opx[i]+b;
            if(j>1&&i<2)str=str+")";
            if(j<4)str=str+opx[j]+c;
            else if(j>3&&i<2)str=c+opx[j]+"("+str+")";
            else if(j==5&&i==3)str=c+opx[j]+"("+str+")";
                else str=c+opx[j]+str;
            if(j<2&&k>1&&i<2)str=str+")";
            str=t+str;
            if((j<2||j==4)&&k>1&&i>1)str=str+")";
            if(k<4)str=str+opx[k]+d+"=24";
                else str=d+opx[k]+str+"=24";
            //alert(str);
            form1.t5.value=str;
            
            return 1;   
          }
        }
        j=j+1;
    }
    i=i+1;     
  }
}

function fun3(e1,e2,e3,e4)
{
  var i,j,k,a,b,c,d,t1,t2,t3;
  var opx=["+","-","*","/"];
  a=e1;b=e2;c=e3;d=e4;
  for(i=0;;)
  {
    if(i>=4)break;
    if(i==0)t1=a+b;   
    if(i==1)t1=a-b;   
    if(i==2)t1=a*b;   
    if(i==3)if(b!=0)t1=a/b;
    for(j=0;;)
    {
        if(j>3)break;
        if(j==0)t2=c+d;
        if(j==1)t2=c-d;
        if(j==2)t2=c*d;
        if(j==3)if(d!=0)t2=c/d;
        for(k=0;;k++)
        {
          if(k>3)break;
          if(k==0)t3=t1+t2;
          if(k==1)t3=t1-t2;
          if(k==2)t3=t1*t2;
          if(k==3)if(d!=0)t3=t1/t2;
          if(t3==24)
          {var str='';
            /*if(k>1)document.write ("(");
            document.write (a+opx[i]+b);
            if(k>1)document.write (")");
            document.write (opx[k]);
            if(k>1)document.write ("(");
            document.write (c+opx[j]+d);
            if(k>1)document.write (")");
            document.write ("=24<br>");*/

            if(k>1&&i<2)str="(";
            str=str+a+opx[i]+b;
            if(k>1&&i<2)str=str+")";
            str=str+opx[k];
            if(k>0&&j<2)str=str+"(";
            str=str+c+opx[j]+d;
            if(k>0&&j<2)str=str+")";
            str=str+"=24";
            form1.t5.value=str;
  
            return 1;   
          }
        }
        j=j+1;
    }
    i=i+1;     
  }
}
function fun2(a,b,c,d)
{
  var i,j,k,str,flg;
  var arr=[a,b,c,d];
  /*arr[0]=a;arr[1]=b;arr[2]c;arr[3]=d;*/
  for(i=0;;)
  {
    if(i>3)break;
    for(j=0;;)
    {
        if(j>3)break;
        if(j==i){j=j+1;continue;}
        for(k=0;;)
        {
          if(k>3)break;
          if(k==i||k==j){k=k+1;continue;}
          for(l=0;;)
          {
            if(l>3)break;
            if(l==i||l==j||l==k){l=l+1;continue;}
            if(arr[i]==3&&arr[j]==3&&arr[k]==8&&arr[l]==8)
                {form1.t5.value="8/(3-8/3)=24";return;}
            flg=fun1(arr[i],arr[j],arr[k],arr[l]);
            if(flg==1)return;
            /*document.write("<b>"+arr[i]);
            document.write(arr[j]);
            document.write(arr[k]);
            document.write(arr[l]+"</b><br>");*/
            flg=fun3(arr[i],arr[j],arr[k],arr[l]);
            if(flg==1)return;
            l=l+1;
          }
          k+=1;
        }
        j=j+1;
    }
    i=i+1;   
  }
  alert("此题无解！");
}

</script>

<a href='javascript:fun2(parseInt(form1.t1.value),parseInt(form1.t2.value),
parseInt(form1.t3.value),parseInt(form1.t4.value));'target="_top">计算</a>