有以下程序

#include <stdio.h>

main()

{ FILE *fp; int i, a[6] = {1,2,3,4,5,6};

fp = fopen( "d2.dat", "w+" );

for (i=0; i<6; i++) fprintf( fp, "%d\n", a[i] );

rewind( fp );

for ( i=0; i<6; i++ ) fscanf( fp, "%d", &a[5-i] );

fclose(fp);

for ( i=0; i<6; i++ ) printf( "%d,", a[i] );

}

程序运行后输出结果是

• A.1,2,3,4,5,6,

• B.6,5,4,3,2,1,

• C.4,5,6,1,2,3,

• D.1,2,3,3,2,1,