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copied!<p><strong>1)</strong> It is supposed to be <code>char **argv</code> or <code>char *argv[]</code> which is <code>a pointer to an array of characters</code> more commonly known as <code>an array of strings</code> <br><br> <strong>2)</strong> <a href="http://www.cplusplus.com/reference/clibrary/cstring/" rel="nofollow">CString</a> is the std library to manipulate C strings (arrays of characters). You cannot resize an array without reallocating, but you can change the contents of elements by referencing it by index:</p> <pre><code>for(int i = 0; i < argc; ++i) { //set all the strings to have a null character in the //first slot so all Cstring operations on this array, //will consider it a null (empty) string argv[i] = 0; } </code></pre> <p><br> <strong>3)</strong> Technically no, however they can be deleted then reallocated:</p> <pre><code>int *array = new int[15]; //array of size 15 delete[] array; array = new int[50]; //array of size 50 </code></pre> <p><strong>4)</strong> This is one way:</p> <pre><code>string *myString; if(argc > 0) { myString = new string(argv[0]); for(int i = 1; i < argc; ++i) myString->append(argv[i]); } </code></pre> <p><strong>5)</strong> Yes, according to Cubbi: </p> <blockquote> <p>POSIX specifies the final null pointer for argv, see for example "The application shall ensure that the last member of this array is a null pointer." at <a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html" rel="nofollow">pubs.opengroup.org/onlinepubs/9699919799/functions/exec.html</a></p> </blockquote> <p>Which means you can do:</p> <pre><code>char *val = NULL; int i = 0; do { val = argv[i++]; //access argv[i], store it in val, then increment i //do something with val } while(val != NULL); //loop until end of argv array </code></pre>

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