问题 单项选择题

有以下程序:
#include <stdio.h>
main()
FILE *fp; int a[10]= 1,2,3,i,n;
fp= fopen("d1.dat","w");
for (i=0; i<3; 1++) fprintf(fp,"%d",a[i]);
fprintf(fp,"\n");
fclose(fp);
fp= fopen("d1.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

答案

参考答案:B

选择题
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