switch statement not working

[GamexCoder]

Switch statement isn't working no clue why.

#include <iostream>
#include <fstream>
#include <string>
#include <windows.h>
using namespace std;

double Tax(double first, double second)
{
    return (first * second);
}

int main()
{
    int choice;
    cout << "1. Calculate Sales Tax " << endl;
    cout << "2. Search orders" << endl;
    cout << "3. Enter Customer Data" << endl;
    cin >> choice;

    switch (choice)
    {
        case 1: void salesTax(); break;
        case 2: void searchOrders(); break;
        case 3: void customerData(); break;
    }
}




void salesTax()
{
    char filename[20], oNumber;
    string YesNo;
    double price, tax, total;
    tax = .0625;

    do
    {
        cout << "Price: ";
        cin >> price;
        total = Tax(price, tax);
        cout << "Original Price: " << "$" << price << endl;
        cout << "Sales Tax: " << "$" << tax << endl;
        cout << "==================================" << endl;
        cout << "Total Amount: " << total + price << endl;

        cout << "Do you want to calculate another items sales tax?"
        cin >> YesNo;

    }while (YesNo == "Yes");
}

void searchOrders()
{

}

void customerData()
{



}

[Mathhead200]

case 1: void salesTax(); break;
case 2: void searchOrders(); break;
case 3: void customerData(); break;
//"void" isn't needed here, and makes no sense in this context.
// If all you want to do is call a function then do that, ie: salesTax();