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What should be sizeof(array) in C

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My array has five elements i.e. integers and when I print sizeof(arr); it gives me 20. I am expecting it to be 5 can someone clarify why it is 20.

posted Jul 4, 2014 by anonymous

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2 Answers

+2 votes
 
Best answer

The size of an integer is 4 bytes. So int array[5] means an array of 5 integers of 4 bytes each.
So sizeof(array) = 4 x 5 = 20 bytes.

Similarly the size of a character is 1 byte. And char array[5] means an array of 5 characters of 1 byte each.
So sizeof(array) = 1 x 5 = 5 bytes.

Hope this helps.

answer Jul 4, 2014 by Ankush Surelia
0 votes

It should give you 20 as sizeof will return the length of the array * size of one element in memory which is 5 * 4 in your case.

answer Jul 4, 2014 by Tapesh Kulkarni
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