C

<02.11>

/* Flat Washer Program */ /* Computes the weight of a batch of flat washers */ #include <stdio.h> #define PI 3.14159 int main(void) { double hole_diameter; /* input - diameter of hole */ double edge_diameter; /* input - diameter of outer edge */ double thickness; /* input - thickness of washer */ double density; /* input - density of material used */ double quantity; /* input - number of washers made */ double weight; /* output - weight of washer batch */ double hole_radius; /* radius of hole */ double edge_radius; /* radius of outer edge */ double rim_area; /* area of rim */ double unit_weight; /* weight of 1 washer */ /* Get the inner diameter, outer diameter, and thickness.*/ printf("Inner diameter in centimeters> "); scanf("%lf", &hole_diameter); printf("Outer diameter in centimeters> "); scanf("%lf", &edge_diameter); printf("Thickness in centimeters> "); scanf("%lf", &thickness); /* Get the material density and quantity manufactured. */ printf("Material density in grams per cubic centimeter> "); scanf("%lf", &density); printf("Quantity in batch> "); scanf("%lf", &quantity); /* Compute the rim area. */ hole_radius = hole_diameter / 2.0; edge_radius = edge_diameter / 2.0; rim_area = PI * edge_radius * edge_radius - PI * hole_radius * hole_radius; /* Compute the weight of a flat washer. */ unit_weight = rim_area * thickness * density; /* Compute the weight of the batch of washers. */ weight = unit_weight * quantity; /* Display the weight of the batch of washers. */ printf("\nThe expected weight of the batch is %.2lf", weight); printf(" grams.\n"); return (0); }

Inner diameter in centimeters> 1.2 Outer diameter in centimeters> 2.4 Thickness in centimeters> 0.1 Material density in grams per cubic centimeter> 7.87 Quantity in batch> 1000 The expected weight of the batch is 2670.23 grams.