Question

write a( much simplified) inventory management system for a video rental store super video that helps them manage information about their rental items (movies, games, etc). when writing the program, pay attention to variable naming and use appropriate access modifier.

1. write an interface rentable to represent a rentable item (e.g a movie or game) with a method rentalCost that takes as a parameter the number of days of rental and returns a double value as the rental cost.

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
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#include <stdio.h>
#include <string.h>
#include <math.h>

//Creating the Struct
typedef struct Pnt
{
float x;
float y;
}Point;

// Function Declarations
void setPoint(Point *ptr,float x_in,float y_in);
void printPoint(Point point,char label[]);
float getMagnitude(Point p);
Point getUnitVector(Point p);
float getSlope(Point p,Point q);
float getDistance(Point p,Point q);
Point getMidPoint(Point p,Point q);

int main()
{
   //Declaring variables
float x,y;
char label1[]={"Point#1:"};
char label2[]={"Point#2:"};

printf("%s:\n",label1);
printf("Enter x:");
scanf("%f",&x);
printf("Enter y:");
scanf("%f",&y);
Point p1;
setPoint(&p1,x,y);

printf("%s:\n",label2);
printf("Enter x:");
scanf("%f",&x);
printf("Enter y:");
scanf("%f",&y);
Point p2;
setPoint(&p2,x,y);

printPoint(p1,label1);
printPoint(p2,label2);

Point p3=getMidPoint(p1,p2);
printPoint(p3,"Mid Point of P1 and P2:");
printf("Magnitude of P1 :%.2f\n",getMagnitude(p1));
printf("Magnitude of P2 :%.2f\n",getMagnitude(p2));
Point uvp1=getUnitVector(p1);
printPoint(uvp1,"Unit Vector of P1:");
printf("Distance betwee Point#1 and Point#2 :%.2f\n",getDistance(p1,p2));
printf("Slope of Point#1 and Point#2:%.2f\n",getSlope(p1,p2));
return 0;
}

void setPoint(Point *ptr,float x_in,float y_in)
{
   ptr->x=x_in;
   ptr->y=y_in;
}
void printPoint(Point point,char label[])
{
printf("%s (%.1f,%.1f)\n",label,point.x,point.y);  
}
float getMagnitude(Point p)
{
   return sqrt(pow(p.x,2)+pow(p.y,2));
}
Point getUnitVector(Point p)
{
   float mag=getMagnitude(p);
   Point np;
   np.x=p.x/mag;
   np.y=p.y/mag;
   return np;
  
}
float getSlope(Point p,Point q)
{
   float s=(p.y-q.y)/(p.x-q.x);
   return s;
}
float getDistance(Point p,Point q)
{
   return sqrt(pow((p.x - q.x), 2) + pow((p.y - q.y), 2));
}
Point getMidPoint(Point p,Point q)
{
   Point mid;
   mid.x=(p.x+q.x)/2;
   mid.y=(p.y+q.y)/2;
   return mid;
}

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Output:

_______________Could you plz rate me well.Thank You