秦九韶算法(多项式求值)

/*
秦九韶算法 p(x)=6x*x*x*x*x+3x*x*x*x-12x*x*x-x*x+8x+7在x=2处的值。
*/

#include "stdio.h"
void main()
{
    //static int a[]={7,8,-1,-12,3,6};

    static float a[]={2.1296,1.912,1.215,0.425,0.0625};
    float y;
    int i;
    float x=1.00;
    y=a[4];
    for(i=3s;i>=0;i--)
    {
           y=y*x+a[i];
    }
     printf("x=%4.2f,y=%6.4f\n",x,y);
}