What should it print ?

Question

what should it print when the code is
print 5*4+3/2-1;
in the language of ongoing coding contest
"Custom Interpreter"
For rules see this
https://www.sololearn.com/learn/9298/?ref=app

Answer 1

The requirements specifications did not touch on operator precedence, but I believe it would be a delighter for your interpreter to be able to calculate the statement according to proper norms,

5*4+3/2-1
(5*4)+(3/2)-1

From the syntax, the fictional language appears to be dynamically-typed. I'm assuming that the division between two integer values would result in an integer result, while the case where either or both parameters are floating-point values, would result in a floating-point value result.

(5*4)+(3/2)-1
20+1-1
20

Of course, both of the above appears to be beyond the scope of this assignment.

Answer 2

If I were to judge, both are acceptable.

20.5 is obtained by carrying out floating-point operation when given two integer values as operands. This isn't wrong. Python, for instance, does that.

While 10 is a bit unorthodox, we were not told/required to develop a language with operator precedence, and hence should not be disqualified as well.

Answer 3

Thanks Hatsy Rei

Answer 4

I'd say it's
(5*4)+(3/2)-1
20+(3/2)-1
20+1.5-1
21.5-1
20.5
Makes more sense to me to make every number a float because the language doesn't offer explicit type casting.

Answer 5

Hatsy Rei what if interpreter is showing 20.5 or 10?

Answer 6

5*4+3/2-1
= (5*4)+(3/2)-1
= 20+1-1
=20.

Note that 3/2 = 1, but 3.0/2.0=1.5

Answer 7

20.5