2 Number float array in c

Question

I was doing some training course, and this question still has my attention.

Question:

Declare an array of type float named math_constants. The array should be big enough to hold 2 numbers.

Why is

float math_constants[2];

Correct?

And why is

float math_constants[1];

Wrong?

It might be a newbie mistake, but its confusing me.

@Tareffic Your question is not specific to iOS, that's why the tag has been removed. — Nikolai Ruhe
– Nikolai Ruhe, Commented May 9, 2014 at 7:41
@NikolaiRuhe i added it, because i was following an iOS course — Tareffic
– Tareffic, Commented May 9, 2014 at 7:42
Now the misunderstanding is clear. The integer in brackets is the size (i.e. the number of elements) of that array, not its upper limit of indexes. — Lee Duhem
– Lee Duhem, Commented May 9, 2014 at 7:42

ajay · Accepted Answer · 2014-05-09 07:35:28Z

4

The number within square brackets is the size of the array, i.e., the number of elements in the array. This is different from the fact that indexing of the elements starts from 0.

answered May 9, 2014 at 7:35

ajay

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Mestica · Accepted Answer · 2014-05-09 07:49:26Z

0

c syntax for array

arrayType array_name[SIZE_OF_ARRAY]

in the case of your example math_constants[1] can hold 1 value, namely when you try to access math_constants[0]

similarly , math_constants[2] can hold 2 value, math_constants[0] and math_constants[1]

edited May 9, 2014 at 7:49

answered May 9, 2014 at 7:35

Mestica

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2 Comments

Nikolai Ruhe Over a year ago

Your syntax example is confusing. You probably wanted to explain how to define an array but you omitted the type.

Mestica Over a year ago

I forgot to include that.

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