有以下程序:
#include <stdio.h>
Main()
{ FILE *fp;
Int i,k=0,n=0;
Fp=fopen("d1.dat","w");
For(i=1;i<4;i++) fprintf(fp,"%d",i);
Fclose(fp);
Fp=fopen("d1.dat","r");
Fscanf(fp,"%d%d",&k,&n);printf("%d %d\n",k,n);
Fclose(fp);
}
执行后输出结果是______。
A.1 2
B.123 0
C.1 23
D.0 0
正确答案是B