有以下程序:
#include<stdio.h>
main()
FILE*fp;int i,k,n;
fp=fopen("data.dat","w+");
for(i=1;i<6;i++)
fprimtf(fp,"%d",i);
if(i%3==0)fprintf(fp,"\n");
rewind(fp);
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) 0 0
B) 123 45
C) 1 4
D) 1 2