有以下程序
#include
main()
FILE *fp; int a[10]=1,2,3,i,n;
fp=fopen("dl.dat","w");
for(i=0;i＜3;i++) fprintf(fp,"%d",a[i]);
fprintf(fp,"\n");
fclose(fp);
fp=fopen("dl.dat","r");
fscanf(fp,"%d",＆n);
fclose(fp);
printf("%d\n",n);程序的运行结果是______。
(A) 12300
(B) 123
(C) 1
(D) 321