#include <stdio.h>
#include <time.h>
#include <stdlib.h>

#define SZ 10

void fillArray( int List[], unsigned int Sz);
unsigned int squeezeOutOdds(int List[], unsigned int Usage);

int main() {

   int A[SZ];
   
   fillArray(A, SZ);
   
   for (int i = 0; i < SZ; i++) {
      printf("%3d:%5d\n", i, A[i]);
   }
   
   unsigned int numEvens = squeezeOutOdds(A, SZ);
   
   for (int i = 0; i < numEvens; i++) {
      printf("%3d:%5d\n", i, A[i]);
   }
   return 0;
}

void fillArray(int List[], unsigned int Size) {
		
   srand( (unsigned int) time(NULL) );
	
   for (int pos = 0; pos < Size; pos++) {
      List[pos] = rand() % 1000;
   }
}

unsigned int squeezeOutOdds(int List[], unsigned int Usage) { 

   unsigned int Trailer = 0;
   while ( Trailer < Usage && List[Trailer] % 2 == 0 )
      ++Trailer;
   if ( Trailer == Usage )
      return Trailer;
      
   unsigned int Leader = Trailer + 1;
   while ( Leader < Usage ) {
      if ( List[Leader] % 2 == 0 ) {
         List[Trailer] = List[Leader];
         ++Trailer;
      }
      ++Leader;
   }
   return Trailer;
}