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POPassing an array as an argument in C++
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  1. POPassing an array as an argument in C++
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    copied!<p>I'm writing a merge sort function, and right now I am just using a test case array (there is no input - this is static, for now). I don't know how to pass an array as an argument. Here is my code right now:</p> <pre><code>//merge sort first attempt #include &lt;iostream&gt; #include &lt;algorithm&gt; #include &lt;vector&gt; int mergeSort(int[]); int main() { int originalarray[] = {1, 3, 5, 7, 9, 2, 4, 6, 8, 10}; mergeSort(originalarray[]); } int mergeSort(int[] originalarray) { int num = (sizeof(originalarray)/sizeof(int)); std::vector&lt;int&gt; original(num); if (num &gt; 2) { return num; } // Fill the array using the elements of originalarray // This is just for demonstration, normally original will be a parameter, // so you won't be filling it up with anything. std::copy(originalarray, originalarray + num, original.begin()); // Create farray and sarray of the appropriate size std::vector&lt;int&gt; farray(num / 2); std::vector&lt;int&gt; sarray(num - farray.size()); // Fill those using elements from original std::copy(original.begin(), original.begin() + farray.size(), farray.begin()); std::copy(original.begin() + farray.size(), original.end(), sarray.begin()); mergeSort(farray); mergeSort(sarray); </code></pre> <p>}</p> <p>Note that this mergeSort function is not functional, as I have not figured out how to merge them yet (that's my assignment). I would like to get my two vectors sorted before I deal with that, and I can't compile this because of my need to pass an array as an argument. I don't understand pointers, so if that is the solution, my excuse is ignorance. I'm learning programming right now, with C++ as a first language, and only have a basic grasp of the language's features. Thanks for the help.</p>
 

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