how do I use comboBox

[QT++]

I want to use a comboBox but am having some problems with the signals. I want to have comboBox with the options

cat
dog
mouse

then when I click a pushButton (which I have already tested and coded) it calls the appropriate function. So the pushButton has the option of calling 3 different functions depending if the user has selected cat, dog or mouse from the comboBox. I know the code below isn't right but hopefully explains the idea.

if (comboBox == cat){
cat();
}
 
if (comboBox == dog){
dog();
}

if (comboBox == cat){
cat();
}

if (comboBox == dog){
dog();
}

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