Why does the compiler not show an error when we try to divide a variable by zero

Question

If we try to run this code:

int d = 10/0;

We get a compiler error. So we cannot divide by zero.

Now consider this code:

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Answer 1

Because your d variable is not constant.

Compiler does only basic (let say trivial) math checks. Your is not basic enough to be done by compiler, because it uses variable that is not const.