Slider not responding to Signal

[eLancaster]

I made a program that converts celsius to fahrenheit and vice versa. It consists of two sliders: sl_celsius: and sl_fheit, and two lcd displays lcd_celsius and lcd_fheit.
Moving sl_celsius displays the celsius temperature in lcd_celsius and the corresponding fahrenheit temperature in lcd_fheit. As the lcd_fheit changes, the sl_fheit also moves.
The problem is that the reverse does not occur (i.e. moving the fahrenheit slider does not cause celsius to be displayed in lcd_celsius and sl_celsius does not move either). I do not understand why this happens.

The connections are as follows:

connect(ui->sl_celsius,SIGNAL(sliderMoved(int)),ui->lcd_celsius,SLOT(display(int)));
 
connect(ui->sl_celsius,SIGNAL(sliderMoved(int)),this,SLOT(calculateFahrenheitTemperature(int)));
 
connect(this,SIGNAL(celsiusSliderMoved(int)),ui->lcd_fheit,SLOT(display(int)));
 
connect(this,SIGNAL(celsiusSliderMoved(int)),ui->sl_fheit,SLOT(setValue(int)));
 
connect(ui->sl_fheit,SIGNAL(sliderMoved(int)),ui->lcd_fheit,SLOT(display(int)));
 
connect(ui->sl_fheit,SIGNAL(sliderMoved(int)),this,SLOT(calculateCelsiusTemperature(int)));
 
connect(this,SIGNAL(fheitSliderMoved(int)),ui->lcd_celsius,SLOT(display(int)));
 
connect(this,SIGNAL(fheitSliderMoved(int)),ui->sl_celsius,SLOT(setValue(int)));

connect(ui->sl_celsius,SIGNAL(sliderMoved(int)),ui->lcd_celsius,SLOT(display(int)));

connect(ui->sl_celsius,SIGNAL(sliderMoved(int)),this,SLOT(calculateFahrenheitTemperature(int)));
    
connect(this,SIGNAL(celsiusSliderMoved(int)),ui->lcd_fheit,SLOT(display(int)));
    
connect(this,SIGNAL(celsiusSliderMoved(int)),ui->sl_fheit,SLOT(setValue(int)));

connect(ui->sl_fheit,SIGNAL(sliderMoved(int)),ui->lcd_fheit,SLOT(display(int)));

connect(ui->sl_fheit,SIGNAL(sliderMoved(int)),this,SLOT(calculateCelsiusTemperature(int)));

connect(this,SIGNAL(fheitSliderMoved(int)),ui->lcd_celsius,SLOT(display(int)));
    
connect(this,SIGNAL(fheitSliderMoved(int)),ui->sl_celsius,SLOT(setValue(int)));

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and these are the definitions for custom fucntions:

void TempConverter::calculateCelsiusTemperature(int temp)
{
    celsius = (temp - 32)*(5/9);
    emit fheitSliderMoved(celsius);
}
 
void TempConverter::calculateFahrenheitTemperature(int temp)
{
    fahrenheit = ((temp * (9/5))+32);
    emit celsiusSliderMoved(fahrenheit);
}

void TempConverter::calculateCelsiusTemperature(int temp)
{
    celsius = (temp - 32)*(5/9);
    emit fheitSliderMoved(celsius);
}

void TempConverter::calculateFahrenheitTemperature(int temp)
{
    fahrenheit = ((temp * (9/5))+32);
    emit celsiusSliderMoved(fahrenheit);
}

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I'd appreciate any help, thanks!