If you divide two integers, you get an integer. You can then cast it to whatever you want. Or, if you want some other type, you need to cast it before the operation is done.
Okay. But I'm storing it in a variable explicitly declared to be a double. That should be enough. If I divide two integers in python or R or Julia or a dollar store calculator I don't get an integer and I don't even have to explicitly type the variable. You have to know that C++ will do that. It's not common sense just like R recycling shorter vectors.
I agree with your point that all languages have their quirks. This is a very poor example however. If it automatically converted to float what would you do if you wanted integer division? I think automatic casting tends to get messy/be pretty evil in general but of course there are exceptions.
You could always do something like:
int divRes = IntA/intB;
double something = divRes*5.342;
At the very least it could warn me. I just tried it in rust and that will error out if you try to divide two ints and store the result in a float which is fine by me.
