Question

You are to write a program IN C++ that asks the user to enter an item's wholesale cost and its markup percentage.
It should then display the item's retail price. For example:

if the an item's wholesale cost is 5.00 and its markup percentage is 100%, then the item's retail price is 10.00
If an item's wholesale cost is 5.00 and its markup percentage is 50%, then the item's retail price is 7.50

Program design specs.

You should have 5 functions. main, 2 user input functions, a function that calculates the markup price and a function that displays the retail price.

Note: Code order: Put all #include statements, then using namespace std;, then your function prototypes, then main, then your user-defined functions.

DESIGN NOTE:   You will pass data by value (i.e. only a copy of the variable)   for ALL of your user-defined functions!

The main function should call the 1st user input function. This user input function will ask the user to input the wholesale cost of an item. Note: Use minor error checking for this function. Don't allow user to enter in a negative wholesale cost or a wholesale cost of 0.    This function should return the wholesale cost back to main. The prototype for this function should be:

double functionname( );

The main function should then call the 2nd user input function. This user input function will ask the user to input the desired markup percentage of an item. Minor error checking for this function. Don't allow user to enter in a negative markup percentage or a markup percentage of 0.    This function should return the markup percentage back to main. The prototype for this function should be:

double functionname( );

The main function should then call the markup price calculation function and pass wholesale cost and markup percentage down to it. NOTE: Pass by value, not by reference! The markup calculation function should compute the retail price and return it to main. The prototype for the markup price function should be:   double functionname(double,double);

main should should then call the display function and pass it the retail price. The display function
will display the price   (format the price to two decimal places )   . This function will NOT return anything.

function prototype for display function should be:   void functionname(double);

NOTE: A loop should be created within main so that the user could calculate for different wholesale costs & markups.

As usual, your program should include your program heading with your name along with program documentation. You NEED to follow design specs to get full points for the program.

To summarize here are all the function prototypes that you need:

double functionname( ); // this function will ask user for wholesales cost & return this to main

double functionname( ); // this function will ask user for markup percentage & return this to main

double functionname(double,double);//this function will get wholesale cost & markup percentage & compute retail price & return retail price to main

void functionname(double);//this function will display the retail price - use 2 digits to right of decimal

Answer 1

code:

#include <iostream>
using namespace std;
double input() //fuction to get wholesale cost
{
double n;
cout<<"Enter the item's wholesale cost:";
cin >>n;
if (n<=0)//condition to check the positive value
{
while(1)
{
cout<<"Enter a positive value for the wholesale cost:";
cin>>n;
if(n>0)
{
return n;
}
}
}
return n;//return the cost
}
double markup()//function for markup percentage
{
double n;
cout<<"Enter item's markup percentage:";
cin >>n;
if (n>0)
{
return n;
}
else
{
markup();
//itrate the process untill positive input is given
}
}
double Markup_cal(double a,double b)
//function to calculate the total price
{
double total;
total=a+(a*b/100);
//total=wholesale price+markup price
return total;
}
void display(double retail)
{
printf("The item's retail price is $%.2f\n",retail);
//display with 2 decimal points
}
int main()
{
char choice;
while(1)
//repete process untill user terminates
{
double rate=input();
double markupper=markup();
double total=Markup_cal(rate,markupper);
display(total);
//Calling all the functions
cout<<"Do you wish to calculate another?Y/N";
cin>>choice;
if(choice=='y' || choice=='Y')
{
continue;
}
else if(choice=='n' || choice=='N')
{
return 0;
}
else
{
cout<<"enter correct choice\n";
}
}
}

#include <iostream> using namespace std double input() //fuction to get wholesale cost { double n; cout<<"Enter the item's wholesale cost:"; cin n; if (n<=0)//condition to check the positive value while(1) cout<<"Enter a positive value for the wholesale cost:"; cin>n; if(n>0) return n } } return n;//return the cost } double markup()//function for markup percentage { double n; cout<<"Enter item's markup percentage: "; cinn; if (n>e) return n; } else markup (); //itrate the process untill positive input is given } double Markup_cal(double a,double b) //function to calculate the total price double total; total-a (a*b/100) ; //total=wholesale price+markup price return total;

void display(double retail) printf("The item's retail price is $%.2f\n", retail); //display with 2 decimal points } int main() char choice; while(1) //repete process untill user terminates { double rate-input ( ); double markupper=markup(); double total-Markup_cal(rate, markupper); display(total); //Calling all the functions cout<<"Do you wish to calculate another?Y/N"; cin>>choice; if (choice== 'y' || choice=='Y') continue; } else if(choice='n' || choice=='N') { return 0; } else cout<<"enter correct choice\n"; }

output:

Enter the item's wholesale cost:50.00 Enter item's markup percentage:10 The item's retail price is $55.00 Do you wish to calculate another?Y/Ny Enter the item's wholesale cost:-8 Enter a positive value for the wholesale cost:15.00 Enter item's markup percentage:100 The item's retail price is $30.00 Do you wish to calculate another?Y/Nn

//if any doubt, please comment