Macros in conditonal operation and data mismatch issue

/*
 * Debugger.c
 *
 *  Created on: 09.01.2015
 *      Author: karthik
 */


# include <stdio.h>
# include <stdlib.h>
# define CEILby2(X) ((X+1)/2)

int main()
{
    int nCycle,nCount=0;
    printf("Understanding of Macros and TypeCasting\n");
    printf("Enter the Cycle in even number for a scenario\n");
    scanf("%d",&nCycle);

    while(nCount <CEILby2(nCycle))
    {
        nCount++;
    }
    printf("Number of cycle executed: %d", nCount);

    return 0;
}

**************************************
Output:
Understanding of Macros and TypeCasting
Enter the Cycle in even number for a scenario
5
 Number of cycle executed:3 ------ expected only 2.


Note: Integer is compared with floating(Real numbers)