Question

Goal: Design and build a simple cash register program in C++ using the programming constructs included (simple expressions, a loop, and if statements).

Problem: A company needs a cash register program to work on their new computer system. The program should first ask whether the payment is in cash and credit card. If it is a credit card transaction, you must get the card pin. The program will then read in a number of prices to read, finally it must read in that many prices and compute the total. A discount is computed from the total at these rates:

$100 3% discount $1000 5% Discount $10,000 11% Discount

The amount of the discount is displayed if it is applicable. Taxes should be computed on the discounted total price at a 6% rate and the information should be displayed on the screen.

Answer 1

Note:

please check the program ,if you need any changes I will do it.

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#include <iostream>
#include <cmath>
using namespace std;

//Function declaration
void tax(double tot,double discount);
int main ()
{
   //Declaring variables
char ch;
int num,pin;
double tot=0,price,discount;
  
//Getting the input entered by the user
cout<<"Card (or) Cash ('c' for Credit Card 's' for cash) :";
cin>>ch;
  
//Based on the user input the corresponding case will get executed
switch(ch)
{
   case 'c':
   case 'C':
       {
           //getting the pin number
           cout<<"Enter the pin no :";
   cin>>pin;
  
   //Getting the prices entered by the user and calculating the total
   cout<<"No of prices to read :";
   cin>>num;
  
   for(int i=0;i<num;i++)
   {
       cout<<"Enter price "<<i+1<<":";
       cin>>price;
      
       tot+=price;
   }
break;
       }
       case 's':
           case 'S':
               {  
   //Getting the prices entered by the user and calculating the total          
   cout<<"No of prices to read :";
   cin>>num;
  
   for(int i=0;i<num;i++)
   {
       cout<<"Enter price "<<i+1<<":";
       cin>>price;
      
       tot+=price;
   }
   break;
   }
   default:{
      
       break;
   }
  
}

//based on the total amount apply discount and calculate the tax
if(tot>=100 && tot<1000)
{
   //Calculating the discount amount
   discount=0.03*tot;
   cout<<"Discount : $"<<discount<<endl;
  
   //Calling the function which calculates the tax
   tax(tot,discount);
  
}
else if(tot>=1000 && tot<10000)

    //Calculating the discount amount{
    discount=0.05*tot;
    cout<<"Discount : $"<<discount<<endl;
   
        //Calling the function which calculates the tax
tax(tot,discount);
}
else if(tot>=10000)
{
        //Calculating the discount amount
    discount=0.11*tot;
    cout<<"Discount : $"<<discount<<endl;

        //Calling the function which calculates the tax
tax(tot,discount);
}



return 0;

}

//Function implementation which calculates the tax
void tax(double tot,double discount)
{
   double tax=0.06*(tot-discount);
   cout<<"Amount of tax is : $"<<tax<<endl;
}

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output:

____________Thank You