Razvrstavanje na pozotivne i negativne elemente niza

#include <stdio.h>
#define N 100

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

void main()
{
    while(1)
        {
            int i;
            printf("\nn? "); int na; scanf("%d", &na);
            if(na<=0 || na>N) break;

            printf("A? "); int a[N]; for (i=0;i<na; scanf("%d", &a[i++]));
            int b[N], c[N], nb=0, nc=0;
            for (i=0; i<na;a[ i]<0 ? (b[nb++]=a[i++]) : (c[nc++]=a[i++]));

            printf("B= "); for (i=0; i<nb; printf("%d ", b[i++])); printf("\n");
            printf("C= "); for (i=0; i<nc; printf("%d ", c[i++])); printf("\n");
        }
}