Question 5.17

#include <iostream>

int main() {
  int quantity; 
  int productNumber;
  double revenue = 0;
  while(true){
    std::cout<<"Please enter the product number(Enter -1 to exit)"<< std::endl;
    std::cin>>productNumber;
    if(productNumber == -1){
      break;
    }
    std::cout<<"Please enter the quantity sold"<< std::endl;
    std::cin>>quantity;
    switch(productNumber){
      case 1:
              revenue+= (2.98 * quantity);
              break;
      case 2: 
              revenue+= (4.50 * quantity);
              break;
      case 3:
              revenue+= (9.98 * quantity);
              break;
      case 4: 
              revenue+= (4.49 * quantity);
              break;
      case 5: 
              revenue+= (6.87 * quantity);
              break;
    } 

    std::cout << "Total revenue generated is: $" << revenue << std::endl;
    
  }
  
}