A.int a[2][2]={{1},{2}};
B.int a[][2]={1,2,3,4};
C.int a[2][2]={{1},2,3};
D.int a[2][]={{1,2},{3,4}};
A.c='97';
B.c="97";
C.c=97;
D.c="a";
A.0
B.1
C.-1
D.NULL没定义,出错
A.int *i=NULL;scanf("%d",i);
B.float *f=NULL;*f=10.5;
C.char t='m', *c=&t;
D.long *L; *c=&t;L='