请教几个程序～～～～

天若有情

看样子楼主也是数学系或者搞计算机的了
1.： method 1
int a;a-a/1000*1000;
now we get last number;
store it in a numberarray;
then loop,it's clearly that we should use 100 devides a....-_-;
method 2:
change the number into string,then it's very simple.
i will give u a class,whilch was just written by me and it can be find in some head file;
CString shutost(long a)//the function can be rewritten.
{
CString fh;
char c[10];
long b,i,j;
i=1;

while(a>0)
{        b=a-a/10*10;
  a=a/10;
     c=b+48;
        i++;
}
i--;
for(j=i;j>0;j--)
fh=fh+c[j];
return fh;
}
2.：对２，３题如果直接这样展开的话精度不会提高得很快，建议进行插值．
对此，我们只需要编写一个进行Ｎ位计算的类，很简单的－＿－．
３：对第４题．．．．这个不用我多说了