Need help with code not getting the correct output

Code is in C

/*

* Computing the Weight of a Batch of Flat Washers

*/

#include /*printf, scanf definitions */

#define PI 3.14159

int

main(void)

{

double innerradius; /* input - radius of a inner circle */

double outerradius; /* input - radius of outer circle */

double idiameter; /* diameter of inner circle */

double odiameter; /* diameter of outer circle */

double rimarea; /* area of a rim */

double matden; /* input - density of material in grams/cm^3 */

double thickness; /* input - thickness of material in centimeters */

double weight; /* weight of a single washer */

double quantity; /* number of washers */

double batch; /* weight of a batch of washers */

/*

* Calculating the radius of both the inner and outer circles

*/

printf("Enter the inner diameter> ");

scanf("%lf", &idiameter);

printf("Enter the outer diameter> ");

scanf("%lf", &odiameter);

innerradius = idiameter / 2.0;

outerradius = odiameter / 2.0;

printf("The inner radius is %lf", &innerradius);

printf("The outer radius is %lf", &outerradius);

/*

* Calculating the area of the rim

*/

rimarea = PI * innerradius * innerradius - PI * outerradius * outerradius;

printf("Area of the flat washer is %f ", &rimarea);

/*

* Finding material density and thickness

*/

printf(" Enter the density of the material in grams/cm cubed ");

scanf(" %lf ",&matden);

printf(" Enter the thickness of the flat washer ");

scanf(" %lf ",&thickness);

/*

* Finding the weight of a single flat washer

*/

weight = rimarea * matden * thickness;

printf("Weight of a single flat washer is %f ",&weight);

/*

* Finding the weight of a batch of flat washers

*/

printf("Number of flat washers in a batch - ");

scanf(" %lf ",&quantity);

batch = weight * quantity;

/*

* Displaying the weight of the batch of washer

*/

printf(" The weight of the batch of washers is %f grams ",&batch);

return (0);

}