exercise-pointer-1.c

// ... includes

void scanFloat(float* f)
{
  //scan a float value from console to the given address
}

void calculate(float r, float* perimeter, float* area)
{
   //calculate the results based on the given r and put them into the specified addresses
}

int main()
{
  float r;
  //get input using function scanFloat(float* r)

  float perimeter, area;
  //generate results using function calculate(float r, float* perimeter, float* area)
  
  printf("r=%f\nperimeter=%f\narea=%f\n", r, perimeter, area);
  
  return 0;
}