49）有以下程序#includeMain){FILE*fp;intI,a[6]={1,2,3,4,5,6};fp=fopen“d2.dat”,”w”);fprintffp,”%d%d”,a[0],a[1],a[2]);fprintffp,“%d%d”,a[3],a[4],a[5]);fclosefp);fp=fopen“d2.dat”,”r”);fscanffp,”“%d%d”,&k,&n);printf“%d%d”,k,n);fclosefp);}程序运行后的输出结果是
(A)12
(B)14
(C)1234
(D)123456