Function help

[nickoolsayz]

im basically trying to make a driver program. So i made a function but having trouble calling the function. Help with the cout statement outputting the amount in dollar form such as $2.00 or $3.45. The set precision and show point isnt working for me. thanks

#include <cstdlib>
#include <iostream>
#include <iomanip>

using namespace std;


double calculateRetail(double, double);

int main(int argc, char *argv[])
{
    

double wholesale;
int markup;

cout << "Enter Items whole cost.\n";
cin >> wholesale;
cout << "Enter items Markup percentage.\n";
cin >> markup;

cout << "Your items retail price is $" << calculateRetail(wholesale, markup) << "." << endl;
    
    system("PAUSE");
    return EXIT_SUCCESS;
}

double retail, wholesale;
double calculateRetail(double wholesale, double markup)
{


retail = wholesale + (wholesale*markup/100);
return retail;
}

[zb0S216C]

When you invoke a function, you're supposed to pass a value equivalent of the type specified. For instance, you've specified that calculateRetail() takes 2 floating-point numbers. So when you call that function, you pass it two floating-point values, like so:

calculateRetail(1.0, 2.0)

_Wazzak

[nickoolsayz]

What if i dont know the value until the user input the numbers?

[zb0S216C]

Then don't invoke the function until you do... or provide default values.

_Wazzak

[nickoolsayz]

The project says to write a function that receives the wholesale cost and percentage as arguements and returns the retail price of the item. so i wont know what the values are until the user inputs the info. so when i enter 5 or 5.00 and 50 for teh percentage it only displays 7.5 instead of 7.50

[ne555]

The set precision and show point isnt working for me. thanks

But in your code you don't use them...
http://cplusplus.com/reference/iostream/manipulators/setprecision/
http://cplusplus.com/reference/iostream/manipulators/fixed/

[nickoolsayz]

I tried but they did not work so i removed them as they were not usefull.

[nickoolsayz]

So i solved my own problem :)

i needed to include

cout << ........ << setprecision (2) << fixed << ..........endl;

thanks anyways