raio/area/volume esfera

#include<stdio.h>
#include<stdlib.h>
void esfera(float r,float *a,float *v);
int main(void)
{
float r,area,vol;
printf("digite raio\n");
scanf("%f",&r);
esfera(r,&area,&vol);
printf("raio esfera=%f\n",r);
printf("area esfera=%f\n",area);
printf("volume esfera=%f\n",vol);
system("pause");
return 0;
}
void esfera(float r,float *a,float *v)
{
float pi=3.14;
*a=4.0*pi*r*r;
*v=(4.0/3.0)*pi*r*r*r;
}