Question

Write a program that processes the data of three car dealerships.

ID           Name   Number   Price   Sales

-------------------------------------------------------

1001         CarMax     192 17000     0.0

1002     AutoNation     151   16000     0.0

1003   Group-1-Auto      166   15000     0.0

1. Define a data type of Dealer using struct, with the following members: ID, name, number of cars sold, price of a car, and total sales.
2. In the main function, declare an array of Dealer, and initialize it with the data above.
3. Design a function, compSales, to calculate the total sales of each dealer:

     sales = number * price

4. compSales takes two parameters: an array of Dealer type and the array size.
5. compSales must be coded using pointer notation.
6. In the main function, print out the sales information nicely:

ID           Name   Number   Price         Sales

-----------------------------------------------------

1001         CarMax     192 17000    3264000.00

1002     AutoNation     151   16000    2416000.00

1003   Group-1-Auto      166   15000    2490000.00

Answer 1

#include <iostream>
#include <string.h>
#include <iomanip>

using namespace std;
struct Dealer
{
int id;
string name;
int numberofcarssold, price;
float total_sales;
};
void compSales(struct Dealer test[], int n)
{
struct Dealer *ptr = NULL;
ptr = test;
for(int i=0; i<n; i++){
float value1 = (ptr->numberofcarssold);
float value2 = (ptr->price);
ptr->total_sales = value1 * value2;
ptr++;
}
  
}
int main()
{
int i;
struct Dealer test_array[3];

// 1st car
test_array[0].id=1001;
test_array[0].name = "CarMax";
test_array[0].numberofcarssold = 192;
test_array[0].price = 17000;
test_array[0].total_sales = 0.0;

// 2nd car
test_array[1].id=1002;
test_array[1].name= "AutoNation";
test_array[1].numberofcarssold = 151;
test_array[1].price = 16000;
test_array[1].total_sales = 0.0;

// 3rd car
test_array[2].id=1003;
test_array[2].name="Group-1-Auto";
test_array[2].numberofcarssold = 166;
test_array[2].price = 15000;
test_array[2].total_sales = 0.0;

cout<<" \n ID \t Name \t \t Number \t Price \t Sales \n ";
//calculate sales value
compSales(test_array,3);
//display the array
for(i=0; i<3; i++)
{
cout<<"\n "<< test_array[i].id;
//cout.width(2);
cout<<"\t"<<right<< test_array[i].name;
//cout.width(2);
cout<<"\t\t"<<test_array[i].numberofcarssold;
cout<<"\t \t"<<test_array[i].price;
cout<<"\t"<<setprecision(2)<<test_array[i].total_sales;
}
return 0;
}

sample output