题目如下
代码
#include<stdio.h>
void print(float x[],float y[],float m)
{
float s,a;
int i,j;
s=0;
for(i=0;i<5;i++)
{
a=1;
for(j=0;j<5;j++)
if(i!=j)
a*=(m-x[j])/(x[i]-x[j]);
s=s+a*y[i];
}
printf("%.6f\n",s);
}
int main()
{
float x[5]={0.4,0.55,0.8,0.9,1},y[5]={0.41075,0.57815,0.88811,1.02652,1.17520};
float m1=0.5,m2=0.7,m3=0.85;
print(x,y,m1);
print(x,y,m2);
print(x,y,m3);
return 0;
}