Avoiding implicit conversion in constructor. The 'explicit' keyword doesn't help here

Question

I am able to avoid the implicit conversion of a constructor using the explicit keyword. So now, conversions like A a1 = 10; can be avoided.

Answer 1

You should use the -Wconversion flag of gcc, that will generate a warning when implicitly casting a float to an int. Add -Werror to transform this warning (all in fact) into an error.