有以下程序

#include <stdio.h>

main( )

{ FILE *fp; int k,n,a[6]={1,2,3,4,5,6};

fp=fopen("d2.dat","w");

fprintf(fp, "%d%d%d\n",a[0],a[1],a[2]); fprintf(fp,"%d%d%d\n",a[3],a[4],a[5]);

fclose(fp);

fp=fopen("d2.dat", " r");

fscanf(fp, "%d%d",&k,&n); printf("%d%d\n",k,n);

fclose(fp);

}

程序运行后的输出结果是

A)1 2

B)1 4

C)123 4

D) 123 456