拉格朗日差值多项式LAGRANGE #include #include void main() { int n=5,i,j; float xx=0.54,LL,L[10],x[10]={0.4,0.5,0.6,0.7,0.8}, y[10]={-0.916291,-0.693147,-0.510826,-0.357765,-0.223