Thread: void problem

the prorgram runs but it shuts down you chose a product. can somebody look for the error?

Code:

#include <iostream>
#include <iomanip>
#include <string>

using namespace std;

void display_menu();
void tax(float);
float total = 0;

int main()
{
char choice;
display_menu();
cout << setiosflags(ios::showpoint) << setiosflags(ios::fixed) << setprecision(2);

cout << "Welcome to the Rodeo Snack Bar!" << endl;
cout << "Your current total is: $"<< total << endl;
cout << "Please enter the letter of your selection: ";
cin >> choice;
cout << endl;

switch (choice)
{

case 'S': case 's':
cout << "Sandwich - $5.00" << endl;
total+=5;
display_menu();
break;
case 'C': case 'c':
cout << "Chips - $1.50" << endl;
total+=1.5;
display_menu();
break;
case 'P': case 'p':
cout << "Pickle - $0.75" << endl;
total+=.75;
display_menu();
break;
case 'B': case 'b':
cout << "Brownie - $1.00" << endl;
total+=1;
display_menu();
break;
case 'R': case 'r':
cout << "Regular Drink - $2.00" << endl;
total+=2;
display_menu();
break;
case 'L': case 'l':
cout << "Large Drink - $3.50" << endl;
total+=3.5;
display_menu();
break;
case 'X' : case 'x':
cout << "Canceled, please start over." << endl;
total = 0;
display_menu();
break;
case 'T' : case 't':
tax(total);
break;
default:
display_menu();
}


}




void display_menu()
{
cout << endl;
cout << "S - Sandwich $5.00" << endl;
cout << "C - Chips $1.50" << endl;
cout << "P - Pickle $0.75" << endl;
cout << "B - Brownie $1.00" << endl;
cout << "R - Regular Drink $2.00" << endl;
cout << "L - Large Drink $3.50" << endl;
cout << "X - Cancel sale and start over" << endl;
cout << "T - Total the sale" << endl;
cout << "All items have additional 8.25% tax." << endl;
}


void tax(float total)
{

cout << "Sub-total: " << total << endl;
cout << "+ Tax : " << total*0.0825 << endl;
cout << "Total : " << total + (total*0.0825)<< endl; 
}

That's what you tell it to do: you print the menu, get a choice, print the answer, print the menu again, then quit. Did you want something else?

will in my case it only flashes the interface. when i choose something it automatically closes!!!
i am using Dev-C++ compiler. i cant do anything with it cause it closes automatically. system pause will not do.