Help needed - Conversions not working

[Dominic McGrath]

include "iostream"

include <windows.h>

using namespace std;

int main()
{
int option;

cout << "Welcome to the converter\n";
cout << "Please select function you would like to convert;\n";
cout << "1 - Degrees Fahrenheit to Celsius;\n";
cout << "2 - Inches to centimeters;\n";
cout << "3 - Pound to Stones.\n";
cout << "Please enter the digit here : ";

cin >> option;

switch(digit);
    {
        case '1' :
            cout << "Please enter your Fahrenheit degrees here : ";
            cin >> number;
            answer = (number - 1) * .5556;
            cout << "Fahrenheit converted to Celsius : " << answer;
            break;

        case '2' :
            cout << "Please enter the amount of inches here : ";
            cin >> number;
            answer = number * 2.54;
            cout << "Inches converted to centimeters : " << answer;
            break;

        case '3' :
            cout << "Please enter the amount of pounds here : ";
            cin >> number;
            answer = number * 14;
            cout << "Pounds converted to stones : " << answer;
            break;
    }
return 0;

}

[Tarquin Delfino]

the following code works

#include <iostream>
// use < > round iostream

using namespace std;

int main()
{
int option;
int number;
float answer;

// define all variables number and answer

cout << "Welcome to the converter\n";
cout << "Please select function you would like to convert;\n";
cout << "1 - Degrees Fahrenheit to Celsius;\n";
cout << "2 - Inches to centimeters;\n";
cout << "3 - Pound to Stones.\n";
cout << "Please enter the digit here : ";

cin >> option;

// use "option" not "digit"
// do not end the switch with a ";"
switch(option)
{

    case 1 :
    // remove single quotes from each 'number' we test for the value
    // not a string
        cout << "Please enter your Fahrenheit degrees here : ";
        cin >> number;
        answer = (number - 32) * 5/9;
        // corrected the formula
        cout << "Fahrenheit converted to Celsius : " << answer;
    break;

    case 2 :
        cout << "Please enter the amount of inches here : ";
        cin >> number;
        // define answer as a float (see above)
        answer = number * 2.54;
        cout << "Inches converted to centimeters : " << answer;
    break;

    case 3 :
        cout << "Please enter the amount of pounds here : ";
        cin >> number;
        answer = number * 14;
        cout << "Pounds converted to stones : " << answer;
    break;
}
return 0;

}