/*        Passing a copy of the entire structure        */
struct stores                                                    
   {                                                                
       char  name[20];                                              
       float price;                                                 
       int   quantity;                                              
   };                                                               
   struct stores update (struct stores product, float p, int q);
   float mul (struct stores stock);
   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);               
   }                                                                
   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);                        
   }
                                                                                                                                   
 


Output                                                           
Input increment values:   price increment and quantity increment 
10 12                                                            
Updated values of item                                           
Name      : XYZ                                                  
Price     : 35.750000                                            
Quantity  : 24                                                   
Value of the item  =  858.000000