for(i=0;i<=N-1;i+) printf ("%3d",a[i]); printf("\n"); for(i=0,j=N-1;i=N/2-1;i+,j-) {t=a[i]; a[i]=a[j]; a[j]=t; printf("In change array \n); for(i=0;i<=N-1;i++) printf("%3d",a[i]); printf("\n"); for(i=0,j=N-1;i<=N/2-1;i++,j-) { t =a[i]; a[i]=a[j]; a[j]=t; } printf("\n change array ：\n");