#include <cstddef>
#include <iostream>
#include <map>
 
#define length(x) (sizeof (x) / sizeof *(x))
 
int main()
{
  int a[] = {1,5,4,5,8,9,5,1,4,7,8,5};
  std::map<int, int> freq;
 
  for ( size_t i = 0; i < length ( a ); i++ )
    ++freq[a[i]];
 
  std::map<int, int>::const_iterator it = freq.begin();
 
  while ( it != freq.end() ) {
    std::cout<< it->first <<": "<< it->second <<std::endl;
    ++it;
  }
}

int j(1);
mode[j] = slist[1];
freq[j]= 1;
 
for (int i=2;i<=n;i++)
{
     if (mode[j] == slist[i])
	freq[j]++;
     else
    {
	j++;
	mode [j] = slist [i];
	freq[j]= 1;
    }//end if
 
}//end for