有以下程序

#include <stdio.h>

main()

{ FILE *fp;

int a[10]={1,2,3,0,0}, i;

fp = fopen("d2.dat", "wb");

fwrite(a, sizeof(int), 5, fp);

fwrite(a, sizeof(int), 5, fp);

fclose(fp);

fp = fopen("d2.dat", "rb");

fread(a, sizeof(int), 10, fp);

fclose(fp);

for (i=0; i<10; i++)

printf("%d,", a[i]);

}

程序的运行结果是

• A.1,2,3,0,0,0,0,0,0,0,

• B.1,2,3,1,2,3,0,0,0,0,

• C.123,0,0,0,0,123,0,0,0,0,

• D.1,2,3,0,0,1,2,3,0,0,