مرتب سازی (Merge Sort)

//Function to merge two pre-sorted arrays
void MergeSort(apvector &arrayA, apvector &arrayB, apvector &arrayC)
{
     int indexA = 0;     // initialize variables for the subscripts
     int indexB = 0;
     int indexC = 0;

     while((indexA < arrayA.length( )) && (indexB < arrayB.length( ))
     {
          if (arrayA[indexA] < arrayB[indexB])
          {
                 arrayC[indexC] = arrayA[indexA];
                 indexA++;    //increase the subscript
          }
         else
         {
                 arrayC[indexC] = arrayB[indexB];
                 indexB++;      //increase the subscript
         }
        indexC++;      //move to the next position in the new array
     }
     // Move remaining elements to end of new array when one merging array is empty
     while (indexA < arrayA.length( ))
     {
           arrayC[indexC] = arrayA[indexA];
           indexA++;
           indexC++;
     }
     while (indexB < arrayB.length( ))
     {
           arrayC[indexC] = arrayB[indexB];
           indexB++;
           indexC++;
     }
     return;
}