How Do I initialize array?

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I want to initialize an array and assigning a value i.e. 20 for all elements in one statement.
To initialize all elements to zero we write. int a[] = {};

Posted 2-May-14 10:26am

khaledkee

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[no name] 2-May-14 16:39pm

int a[5] = {20,20,20,20,20};

khaledkee 2-May-14 17:32pm

what if the array of size 1000. i can't write 1000 "20"s

[no name] 2-May-14 22:51pm

What if? You asked and got your answer. You said nothing about the size of the array.

Maciej Los 2-May-14 17:34pm

Sounds like answer ;)

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CPallini · Accepted Answer · 2014-05-02T10:46:00

Solution 1

You probably have to call the memset function. However, have a look at this Stack Overflow question[^].

Posted 2-May-14 10:46am

CPallini

Comments

khaledkee 2-May-14 17:33pm

Does memset perform loops or takes unreasonable time with large size of the array.

Sergey Alexandrovich Kryukov 2-May-14 18:24pm

In CPU instruction set, writing to a big continuous memory area is anyway based on a loop, so C can generate perfectly optimal code for that, which cannot be faster.
—SA

khaledkee 2-May-14 18:29pm

Thanks for explanation.

Sergey Alexandrovich Kryukov 2-May-14 18:34pm

You are welcome. Good luck learning programming.
—SA

Maciej Los 2-May-14 17:35pm

+5!

CPallini 3-May-14 4:28am

Thank you.

Sergey Alexandrovich Kryukov 2-May-14 18:24pm

5ed.
—SA

CPallini 3-May-14 4:28am

Thank you.