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Pass by reference not working

beeb (20)
I don't understand why the function call (convertFtoC or convertCtoF) is not working. It seems like everything else is working but the function call is not accessing the function I created above.
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#include <iostream>
using namespace std;

void convertFtoC( double& f )
{
    (f - 32) * 5.0/9.0;
}

void convertCtoF( double& c )
{
    (c + 32) * 9.0/5.0;
}


int main()
{
    char yorn;

    while (! ( (yorn == 'n') || (yorn == 'N') ) )
    {
        char answer;
        double fdeg, cdeg;

        cout << "Please enter C if you want to enter a degree in Centigrade, F if you want to enter a degree in Fahrenheit." << endl;
        cin >> answer;
        if ( (answer == 'C') || (answer == 'c') )
            {
                cout << "Please enter a number to be converted to Fahrenheit" << endl;
                cin >> cdeg;
                cout << "You entered " << cdeg << " Centigrade, ";
                convertCtoF(cdeg);
                cout << "which is " << cdeg << " Fahrenheit." << endl;
            }
        if ( (answer == 'F') || (answer == 'f') )
            {
                cout << "Please enter a number to be converted to Centigrade" << endl;
                cin >> fdeg;
                cout << "You entered " << fdeg << " Fahrenheit, ";
                convertFtoC(fdeg);
                cout << "which is " << fdeg << " Centigrade" << endl;
            }
        cout << "Do you want to do another conversion?" << endl;
        cin >> yorn;
    }
    return 0;
}
Branflakes91093 (207)
You don't actually do anything to the variables on lines 6 and 11. Use '=' to set f and c to whatever you need them to be.

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f = (f - 32) * 5.0/9.0;

c = (c + 32) * 9.0/5.0;
Last edited on
beeb (20)
thank you, something so simple
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