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To convert a single byte of the array, you can use 'sprintf()' (<a href="http://www.cplusplus.com/reference/clibrary/cstdio/sprintf/" rel="ugc">http://www.cplusplus.com/reference/clibrary/cstdio/sprintf/</a>) with the '%x' format specifier: 
<pre><code class="code-1 nolinks" id="code-8170147"><span>char hex[3];</span>
<span>unsigned char my_byte = 0x42;</span>
<span></span>
<span>sprintf(hex,&quot;%2.2x&quot;, my_byte);</span>
</code></pre>
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Now all you need to do is to build that into a loop and apply that to each array element consecutively.
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When I ran this sample code and try to access hex[3], it is not printing anything and hex[0] is showing as null.<br />
Any better ways?
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<div class="content wysiwyg-content">
How to convert byte array to hex string array in C.<br />
<br />
Provide me sample function.
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How to convert byte array to hex string array in C.

Provide me sample function.

How to convert byte array to hex string array in C

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.