অতিভুজের দৈর্ঘ্য-C

#include <stdio.h>
#include<math.h>
int main()
{
    double a,b,h;
    scanf("%lf %lf",&a,&b);
    h=sqrt((a*a)+(b*b));
    printf("%lf\n",h);
    return 0;
}