Dividing by 100 returns 0

Question

I just wanted to calculate the VAT, but when i divide by 100 to obtain the total price (price*VAT/100), but it returns me 0.0. Here\'s my code:

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Answer 1

The problem is that what you're putting in your float variable is the result of operations on integers: it's an integer. In other words, a.precio * a.iva / 100 is first evaluated to an integer (that's where you lose precision), and then this integer is assigned to a.total as a float.

You therefore need to specify that the operation a.precio * a.iva / 100 has to be done on floats by casting the integer values.

Change

a.total=a.precio*a.iva/100;

to

a.total= ((float)a.precio)*a.iva/100;