有以下程序#include<stdio.h>main(){FILE *fp; int i,a[6]={l,2,3,4,5,6};fp=fopen("d3.dat","w+b");fwrite(a,sizeof(int),6,fp);fseek(fp,sizeof(int)*3,SEEK_SET);/*该语句使读文件的位置指针从文件头向后移动3个int型数据*/fread(a,sizeof(int),3,fp); fclose(fp);for(i=0;i<6;i++)printf("%d,",a[i]);}程序运行后的输出结果是
A.4,5,6,4,5,6,
B.1,2,3,4,5,6,
C.4,5,6,1,2,3,
D.6,5,4,3,2,1,