Zero an array in C code

Question

Possible Duplicates    How to initialize an array to something in C without a loop    How to initialize an array in C       How can I zero a known size of an array without using a for or any other loop    For example   arr 20    0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0    This is the long way    I need it the short way

User · Answer

int arr 20     0  would be easiest if it only needs to be done once

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Note  You can use memset with any character   Example   int arr 20   memset arr   A   sizeof arr      Also could be partially filled  int arr 20   memset  amp arr 5   0  10     But be carefull  It is not limited for the array size  you could easily cause severe damage to your program doing something like this   int arr 20   memset arr  0  200     It is going to work  under windows  and zero memory after your array  It might cause damage to other variables values

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int arr 20   memset arr  0  sizeof arr     See the reference for memset

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Using memset   int something 20   memset something  0  20   sizeof int

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int arr 20     0     C99   6 7 8 21      If there are fewer initializers in a brace-enclosed list than there are elements or members   of an aggregate  or fewer characters in a string literal used to initialize an array of known   size  than  there  are  elements  in  the  array   the  remainder  of  the  aggregate  shall  be initialized implicitly the same as objects that have static storage duration

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man bzero  NAME    bzero - write zero-valued bytes  SYNOPSIS     include  lt strings h gt      void bzero void  s  size t n    DESCRIPTION    The  bzero    function sets the first n bytes of the byte area starting    at s to zero  bytes containing   0

[c] Zero an array in C code

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