Function value of the function f(x)=x^3+x^2/2+2/x^2

Problem Statement
Write a c program to
first scan a number say x
 and then calculate the value of following number
f(x)=x³+x²/2+2/x²


#include<stdio.h>
#include<math.h>
int main()
{
  int x;
  float res;
  scanf("%d", &x);
  res= pow(x, 3) + (x*x)/2.0 + (2.0)/(x*x);
  printf("Result=%0.2f\n", res);
  return 0;
}