#include <stdio.h>
#include <math.h>
#include <string.h>
float f(float x)
{
return 4*pow(x,3)-6*pow(x,2)+4; // 이 함수 부분을 바꿔줘야 함
}
int main()
{
int i,n;
float x0,xn,h,y[20],so,se,ans,x[20];
printf("\n Enter values of x0,xn,h: ");
scanf("%f%f%f",&x0,&xn,&h);
n=(xn-x0)/h;
if(n%2==1)
{
n=n+1;
}
h=(xn-x0)/n;
printf("\n Refined value of n and h are:%d %f\n",n,h);
printf("\n Y values: \n");
for(i=0; i<=n; i++)
{
x[i]=x0+i*h;
y[i]=f(x[i]);
printf("\n %f\n",y[i]);
}
so=0;
se=0;
for(i=1; i<n; i++)
{
if(i%2==1)
{
so=so+y[i];
}
else
{
se=se+y[i];
}
}
ans=h/3*(y[0]+y[n]+4*so+2*se);
printf("\n Final integration is %f\n",ans);
}
