问大家个循环体呀 不会呀

[zhang4665032]

就是能用for循环写出l(k)=[x(k)-x(0)]*[x(k)-x(1)]*.......*[x(k)-x(k-1)]*[x(k)-x(k+1)]*...[x(k)-x(n)]吗？也就是没有第k项了，k是从0到n, 谢谢阿

[janghulangz]

我不知道啊

[ysuliu]

long res=1;
for(int i=0; i<=n; ++i)
{
if(i==k) continue;
res*=(x(k)-x(i));
}

[hityct1]

double result=1;
for(int i=0;i<n;++i)
{
result=result*(x[k]-x[i]);
}

[hityct1]

错了，取消。

[fallinleave]

l(k)==0

[ttkk_2007]

for(int i = 0; i <= n; ++i){
   int res = 1;
   if(i == k)
      continue;
   res *= x(k) - x(i);
}

[fallening]

[code=C/C++]
long double ans = 1.0L;
for( unsigned int i = 0; i <= n; ++i )
{
if( i == k )
continue;
ans *= x(k) - x(i);
}
return ans;
[/Code]