Structure and Unions

Write a simple program to illustrate the method of sending an entire structure as a parameter to a function.

#include <stdio.h>
 struct stores
   {                                                               
       char  name[20];                                             
       float price;                                                
       int   quantity;                                             
   };                                                              
   struct stores update (struct stores product, float p, int q);
   float mul (struct stores stock);
void main()
   {
       float    p_increment, value;
       int      q_increment;
       struct stores item = {"XYZ", 25.75, 12};
       printf("\nInput increment values:");
       printf("   price increment and quantity increment\n");
       scanf("%f %d", &p_increment, &q_increment);
   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
       item  = update(item, p_increment, q_increment);
   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
       printf("Updated values of item\n\n");
       printf("Name      : %s\n",item.name);
       printf("Price     : %f\n",item.price);
       printf("Quantity  : %d\n",item.quantity);
   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
       value  = mul(item);
   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
       printf("\nValue of the item  =  %f\n", value);
       getch();
   }
   struct stores update(struct stores product, float p, int q)
   {
       product.price += p;
       product.quantity += q;
       return(product);
   }
   float mul(struct stores stock)
   {
       return(stock.price * stock.quantity);
   }