有下列程序: #include <stdio.h> main() {FILE
题型:单项选择题
问题:
有下列程序: #include <stdio.h> main() {FILE *fp; int a[10]={1,2,3},i,n;fp=fopen("d1.dat","w");for(i=0;i<3;i++) fprintf(fp,"%d",a[i]);fprintf(fp,"\n");fclose(fp);fp=open("d1.dat","r");fscanf(fp,"%d",&n);fclose(fp);prinff("%d\n",n); 程序的运行结果是( )。
A.12300
B.123
C.1
D.321