The need to find the Icm is pretty common in C++ programming. This is just a basic code for finding the lcm of two integers:

 int lcm(int large, int small){   int max = large * small; // % until max   int mult = large; // will address lcm   int factor = 2; // large * factor until lcm   while ((mult % small) && (mult <= max))   {      mult = large * factor;      factor++;   }   return mult;}