#include<stdio.h>
#include<math.h>

#define PI 3.1415926

void hardness()
{
    double R,h,d1,d2,m,p1,p2,g;
    R=1.59;
    g=9.8;
    scanf("%lf,%lf,%lf",&h,&d1,&m);

    d2=2*sqrt(R*R-(R-h)*(R-h));



    p1=(0.102*2*m*g)/(PI*R(R-sqrt(R*R-d1*d1)));

    p2=(0.102*2*m*g)/(PI*R(R-sqrt(R*R-d2*d2)));




    printf("%lf,%lf\n",p1,p2);

}

int main(void)
{
    while(2>1)
        hardness();
    return 0;
}

编译时说p1,p2那两行有问题：term does not evaluate to a function