Question

(Calculating Sales) An online retailer sells five products whose retail prices are as follows: Product 1, $$2.98; Product 2, $4.50; Product 3, $9.98; Product 4, $4.49, and Product 5, $6.87. Write an application that reads a series of pairs of numbers s follows:

a) product number

b) quanity sold

Your program should use a switch statement to determine the retail price for each product. It should calculate and display the total retail value of all products sold. Use a sentinel-controlled loop to determine when the program should stop looping and display the final results. Use these modifications:

1. Create a Product class.

2. The Product should determine the price based on the ProductID

3. The Product should track the quantity sold.

4. The Product should have a calcTotal method to return total for product.

5.  No console I/O in Product class.

Answer 1

#include <stdio.h>

int main()
   {
   float list[5]={2.98,4.50,9.98,4.49,6.87   };
   int producttype=0;
   int qty;
   double total=0;
   printf("Below is the List of Products with Price\n");
   for(int i=0;i<5;i++)
   {
       printf("Product%d Price is %.2f\n",i+1,list[i]);
   }
   printf("\nEnter pairs of Product Numbers and Its Quantities.\n");
   printf("Enter -1 for the Product Number to end input.\n");
  
  
   while(true){
      
       scanf("%d",&producttype);
       if(producttype == -1)
       {
       break;  
       }
       scanf("%d",&qty);
      
       switch(producttype){
          
           case 1:
               total=total+qty*2.98;
               break;
           case 2:
               total=total+qty*4.50;
               break;
           case 3:
               total=total+qty*9.98;
               break;
           case 4:
               total=total+qty*4.49;
               break;
           case 5:
               total=total+qty*6.87;
               break;
           default:
               printf("Wrong Product Id\n");
               break;
              
       }
      
      
   }
   printf("Sum of the purchases is :%.2f\n",total);
}

OUTPUT

Second Method

#include <stdio.h>

float calcTotal(int quant, float num,float tot)
{
   tot = tot + (quant*num);
   return tot;
}

int main()
   {
   float list[5]={2.98,4.50,9.98,4.49,6.87   };
   int producttype=0;
   int qty;
   double total=0;
   printf("Below is the List of Products with Price\n");
   for(int i=0;i<5;i++)
   {
       printf("Product%d Price is %.2f\n",i+1,list[i]);
   }
   printf("\nEnter pairs of Product Numbers and Its Quantities.\n");
   printf("Enter -1 for the Product Number to end input.\n");
  
  
   while(true){
      
       scanf("%d",&producttype);
       if(producttype == -1)
       {
       break;  
       }
       scanf("%d",&qty);
      
       switch(producttype){
          
           case 1:
               total=calcTotal(qty,list[0],total);
               break;
           case 2:
               total=calcTotal(qty,list[1],total);
               break;
           case 3:
               total=calcTotal(qty,list[2],total);
               break;
           case 4:
               total=calcTotal(qty,list[3],total);
               break;
           case 5:
               total=calcTotal(qty,list[4],total);
               break;
           default:
               printf("Wrong Product Id\n");
               break;
              
       }
      
      
   }
   printf("Sum of the purchases is :%.2f\n",total);
}

OUTPUT